diff --git a/src/dict.c b/src/dict.c
index d263569..5022a5f 100644
--- a/src/dict.c
+++ b/src/dict.c
@@ -15,10 +15,10 @@
 
 #if defined(FEAT_EVAL) || defined(PROTO)
 
-/* List head for garbage collection. Although there can be a reference loop
- * from partial to dict to partial, we don't need to keep track of the partial,
- * since it will get freed when the dict is unused and gets freed. */
-static dict_T		*first_dict = NULL;	/* list of all dicts */
+// List head for garbage collection. Although there can be a reference loop
+// from partial to dict to partial, we don't need to keep track of the partial,
+// since it will get freed when the dict is unused and gets freed.
+static dict_T		*first_dict = NULL;
 
 /*
  * Allocate an empty header for a dictionary.
@@ -31,7 +31,7 @@
     d = ALLOC_CLEAR_ONE(dict_T);
     if (d != NULL)
     {
-	/* Add the dict to the list of dicts for garbage collection. */
+	// Add the dict to the list of dicts for garbage collection.
 	if (first_dict != NULL)
 	    first_dict->dv_used_prev = d;
 	d->dv_used_next = first_dict;
@@ -109,15 +109,15 @@
     hashitem_T	*hi;
     dictitem_T	*di;
 
-    /* Lock the hashtab, we don't want it to resize while freeing items. */
+    // Lock the hashtab, we don't want it to resize while freeing items.
     hash_lock(&d->dv_hashtab);
     todo = (int)d->dv_hashtab.ht_used;
     for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
     {
 	if (!HASHITEM_EMPTY(hi))
 	{
-	    /* Remove the item before deleting it, just in case there is
-	     * something recursive causing trouble. */
+	    // Remove the item before deleting it, just in case there is
+	    // something recursive causing trouble.
 	    di = HI2DI(hi);
 	    hash_remove(&d->dv_hashtab, hi);
 	    dictitem_free(di);
@@ -125,14 +125,14 @@
 	}
     }
 
-    /* The hashtab is still locked, it has to be re-initialized anyway */
+    // The hashtab is still locked, it has to be re-initialized anyway
     hash_clear(&d->dv_hashtab);
 }
 
     static void
 dict_free_dict(dict_T *d)
 {
-    /* Remove the dict from the list of dicts for garbage collection. */
+    // Remove the dict from the list of dicts for garbage collection.
     if (d->dv_used_prev == NULL)
 	first_dict = d->dv_used_next;
     else
@@ -176,9 +176,9 @@
     for (dd = first_dict; dd != NULL; dd = dd->dv_used_next)
 	if ((dd->dv_copyID & COPYID_MASK) != (copyID & COPYID_MASK))
 	{
-	    /* Free the Dictionary and ordinary items it contains, but don't
-	     * recurse into Lists and Dictionaries, they will be in the list
-	     * of dicts or list of lists. */
+	    // Free the Dictionary and ordinary items it contains, but don't
+	    // recurse into Lists and Dictionaries, they will be in the list
+	    // of dicts or list of lists.
 	    dict_free_contents(dd);
 	    did_free = TRUE;
 	}
@@ -577,7 +577,7 @@
     }
     else
     {
-	/* Avoid a malloc/free by using buf[]. */
+	// Avoid a malloc/free by using buf[].
 	vim_strncpy(buf, key, len);
 	akey = buf;
     }
@@ -764,7 +764,7 @@
      */
     if (*start != '}')
     {
-	if (eval1(&start, &tv, FALSE) == FAIL)	/* recursive! */
+	if (eval1(&start, &tv, FALSE) == FAIL)	// recursive!
 	    return FAIL;
 	if (*start == '}')
 	    return NOTDONE;
@@ -798,14 +798,14 @@
 	    key = tv_get_string_buf_chk(&tvkey, buf);
 	    if (key == NULL)
 	    {
-		/* "key" is NULL when tv_get_string_buf_chk() gave an errmsg */
+		// "key" is NULL when tv_get_string_buf_chk() gave an errmsg
 		clear_tv(&tvkey);
 		goto failret;
 	    }
 	}
 
 	*arg = skipwhite(*arg + 1);
-	if (eval1(arg, &tv, evaluate) == FAIL)	/* recursive! */
+	if (eval1(arg, &tv, evaluate) == FAIL)	// recursive!
 	{
 	    if (evaluate)
 		clear_tv(&tvkey);
@@ -881,8 +881,8 @@
 	    di1 = dict_find(d1, hi2->hi_key, -1);
 	    if (d1->dv_scope != 0)
 	    {
-		/* Disallow replacing a builtin function in l: and g:.
-		 * Check the key to be valid when adding to any scope. */
+		// Disallow replacing a builtin function in l: and g:.
+		// Check the key to be valid when adding to any scope.
 		if (d1->dv_scope == VAR_DEF_SCOPE
 			&& HI2DI(hi2)->di_tv.v_type == VAR_FUNC
 			&& var_check_func_name(hi2->hi_key, di1 == NULL))
@@ -929,8 +929,8 @@
 dict_equal(
     dict_T	*d1,
     dict_T	*d2,
-    int		ic,	/* ignore case for strings */
-    int		recursive) /* TRUE when used recursively */
+    int		ic,	    // ignore case for strings
+    int		recursive)  // TRUE when used recursively
 {
     hashitem_T	*hi;
     dictitem_T	*item2;
@@ -1004,19 +1004,19 @@
 
 	    if (what == 0)
 	    {
-		/* keys() */
+		// keys()
 		li->li_tv.v_type = VAR_STRING;
 		li->li_tv.v_lock = 0;
 		li->li_tv.vval.v_string = vim_strsave(di->di_key);
 	    }
 	    else if (what == 1)
 	    {
-		/* values() */
+		// values()
 		copy_tv(&di->di_tv, &li->li_tv);
 	    }
 	    else
 	    {
-		/* items() */
+		// items()
 		l2 = list_alloc();
 		li->li_tv.v_type = VAR_LIST;
 		li->li_tv.v_lock = 0;
@@ -1079,7 +1079,7 @@
     int		todo = (int)di->dv_hashtab.ht_used;
     hashitem_T	*hi;
 
-    /* Set readonly */
+    // Set readonly
     for (hi = di->dv_hashtab.ht_array; todo > 0 ; ++hi)
     {
 	if (HASHITEM_EMPTY(hi))
@@ -1139,4 +1139,4 @@
     }
 }
 
-#endif /* defined(FEAT_EVAL) */
+#endif // defined(FEAT_EVAL)
diff --git a/src/diff.c b/src/diff.c
index dd5fb22..f996904 100644
--- a/src/diff.c
+++ b/src/diff.c
@@ -24,7 +24,7 @@
 static int diff_busy = FALSE;	    // using diff structs, don't change them
 static int diff_need_update = FALSE; // ex_diffupdate needs to be called
 
-/* flags obtained from the 'diffopt' option */
+// flags obtained from the 'diffopt' option
 #define DIFF_FILLER	0x001	// display filler lines
 #define DIFF_IBLANK	0x002	// ignore empty lines
 #define DIFF_ICASE	0x004	// ignore case
@@ -41,14 +41,14 @@
 
 static long diff_algorithm = 0;
 
-#define LBUFLEN 50		/* length of line in diff file */
+#define LBUFLEN 50		// length of line in diff file
 
-static int diff_a_works = MAYBE; /* TRUE when "diff -a" works, FALSE when it
-				    doesn't work, MAYBE when not checked yet */
+static int diff_a_works = MAYBE; // TRUE when "diff -a" works, FALSE when it
+				 // doesn't work, MAYBE when not checked yet
 #if defined(MSWIN)
-static int diff_bin_works = MAYBE; /* TRUE when "diff --binary" works, FALSE
-				      when it doesn't work, MAYBE when not
-				      checked yet */
+static int diff_bin_works = MAYBE; // TRUE when "diff --binary" works, FALSE
+				   // when it doesn't work, MAYBE when not
+				   // checked yet
 #endif
 
 // used for diff input
@@ -124,8 +124,8 @@
 
     if (!win->w_p_diff)
     {
-	/* When there is no window showing a diff for this buffer, remove
-	 * it from the diffs. */
+	// When there is no window showing a diff for this buffer, remove
+	// it from the diffs.
 	FOR_ALL_WINDOWS(wp)
 	    if (wp->w_buffer == win->w_buffer && wp->w_p_diff)
 		break;
@@ -158,7 +158,7 @@
     int		i;
 
     if (diff_buf_idx(buf) != DB_COUNT)
-	return;		/* It's already there. */
+	return;		// It's already there.
 
     for (i = 0; i < DB_COUNT; ++i)
 	if (curtab->tp_diffbuf[i] == NULL)
@@ -254,7 +254,7 @@
     int		idx;
     tabpage_T	*tp;
 
-    /* Handle all tab pages that use the current buffer in a diff. */
+    // Handle all tab pages that use the current buffer in a diff.
     FOR_ALL_TABPAGES(tp)
     {
 	idx = diff_buf_idx_tp(curbuf, tp);
@@ -286,7 +286,7 @@
     int		inserted, deleted;
     int		n, off;
     linenr_T	last;
-    linenr_T	lnum_deleted = line1;	/* lnum of remaining deletion */
+    linenr_T	lnum_deleted = line1;	// lnum of remaining deletion
     int		check_unchanged;
 
     if (diff_internal())
@@ -301,19 +301,19 @@
 
     if (line2 == MAXLNUM)
     {
-	/* mark_adjust(99, MAXLNUM, 9, 0): insert lines */
+	// mark_adjust(99, MAXLNUM, 9, 0): insert lines
 	inserted = amount;
 	deleted = 0;
     }
     else if (amount_after > 0)
     {
-	/* mark_adjust(99, 98, MAXLNUM, 9): a change that inserts lines*/
+	// mark_adjust(99, 98, MAXLNUM, 9): a change that inserts lines
 	inserted = amount_after;
 	deleted = 0;
     }
     else
     {
-	/* mark_adjust(98, 99, MAXLNUM, -2): delete lines */
+	// mark_adjust(98, 99, MAXLNUM, -2): delete lines
 	inserted = 0;
 	deleted = -amount_after;
     }
@@ -322,9 +322,9 @@
     dp = tp->tp_first_diff;
     for (;;)
     {
-	/* If the change is after the previous diff block and before the next
-	 * diff block, thus not touching an existing change, create a new diff
-	 * block.  Don't do this when ex_diffgetput() is busy. */
+	// If the change is after the previous diff block and before the next
+	// diff block, thus not touching an existing change, create a new diff
+	// block.  Don't do this when ex_diffgetput() is busy.
 	if ((dp == NULL || dp->df_lnum[idx] - 1 > line2
 		    || (line2 == MAXLNUM && dp->df_lnum[idx] > line1))
 		&& (dprev == NULL
@@ -350,7 +350,7 @@
 		}
 	}
 
-	/* if at end of the list, quit */
+	// if at end of the list, quit
 	if (dp == NULL)
 	    break;
 
@@ -365,25 +365,25 @@
 	 *		3     5  6
 	 *		3     5  6
 	 */
-	/* compute last line of this change */
+	// compute last line of this change
 	last = dp->df_lnum[idx] + dp->df_count[idx] - 1;
 
-	/* 1. change completely above line1: nothing to do */
+	// 1. change completely above line1: nothing to do
 	if (last >= line1 - 1)
 	{
-	    /* 6. change below line2: only adjust for amount_after; also when
-	     * "deleted" became zero when deleted all lines between two diffs */
+	    // 6. change below line2: only adjust for amount_after; also when
+	    // "deleted" became zero when deleted all lines between two diffs
 	    if (dp->df_lnum[idx] - (deleted + inserted != 0) > line2)
 	    {
 		if (amount_after == 0)
-		    break;	/* nothing left to change */
+		    break;	// nothing left to change
 		dp->df_lnum[idx] += amount_after;
 	    }
 	    else
 	    {
 		check_unchanged = FALSE;
 
-		/* 2. 3. 4. 5.: inserted/deleted lines touching this diff. */
+		// 2. 3. 4. 5.: inserted/deleted lines touching this diff.
 		if (deleted > 0)
 		{
 		    if (dp->df_lnum[idx] >= line1)
@@ -391,12 +391,12 @@
 			off = dp->df_lnum[idx] - lnum_deleted;
 			if (last <= line2)
 			{
-			    /* 4. delete all lines of diff */
+			    // 4. delete all lines of diff
 			    if (dp->df_next != NULL
 				    && dp->df_next->df_lnum[idx] - 1 <= line2)
 			    {
-				/* delete continues in next diff, only do
-				 * lines until that one */
+				// delete continues in next diff, only do
+				// lines until that one
 				n = dp->df_next->df_lnum[idx] - lnum_deleted;
 				deleted -= n;
 				n -= dp->df_count[idx];
@@ -408,7 +408,7 @@
 			}
 			else
 			{
-			    /* 5. delete lines at or just before top of diff */
+			    // 5. delete lines at or just before top of diff
 			    n = off;
 			    dp->df_count[idx] -= line2 - dp->df_lnum[idx] + 1;
 			    check_unchanged = TRUE;
@@ -420,13 +420,13 @@
 			off = 0;
 			if (last < line2)
 			{
-			    /* 2. delete at end of diff */
+			    // 2. delete at end of diff
 			    dp->df_count[idx] -= last - lnum_deleted + 1;
 			    if (dp->df_next != NULL
 				    && dp->df_next->df_lnum[idx] - 1 <= line2)
 			    {
-				/* delete continues in next diff, only do
-				 * lines until that one */
+				// delete continues in next diff, only do
+				// lines until that one
 				n = dp->df_next->df_lnum[idx] - 1 - last;
 				deleted -= dp->df_next->df_lnum[idx]
 							       - lnum_deleted;
@@ -438,7 +438,7 @@
 			}
 			else
 			{
-			    /* 3. delete lines inside the diff */
+			    // 3. delete lines inside the diff
 			    n = 0;
 			    dp->df_count[idx] -= deleted;
 			}
@@ -455,24 +455,24 @@
 		{
 		    if (dp->df_lnum[idx] <= line1)
 		    {
-			/* inserted lines somewhere in this diff */
+			// inserted lines somewhere in this diff
 			dp->df_count[idx] += inserted;
 			check_unchanged = TRUE;
 		    }
 		    else
-			/* inserted lines somewhere above this diff */
+			// inserted lines somewhere above this diff
 			dp->df_lnum[idx] += inserted;
 		}
 
 		if (check_unchanged)
-		    /* Check if inserted lines are equal, may reduce the
-		     * size of the diff.  TODO: also check for equal lines
-		     * in the middle and perhaps split the block. */
+		    // Check if inserted lines are equal, may reduce the
+		    // size of the diff.  TODO: also check for equal lines
+		    // in the middle and perhaps split the block.
 		    diff_check_unchanged(tp, dp);
 	    }
 	}
 
-	/* check if this block touches the previous one, may merge them. */
+	// check if this block touches the previous one, may merge them.
 	if (dprev != NULL && dprev->df_lnum[idx] + dprev->df_count[idx]
 							  == dp->df_lnum[idx])
 	{
@@ -485,7 +485,7 @@
 	}
 	else
 	{
-	    /* Advance to next entry. */
+	    // Advance to next entry.
 	    dprev = dp;
 	    dp = dp->df_next;
 	}
@@ -495,7 +495,7 @@
     dp = tp->tp_first_diff;
     while (dp != NULL)
     {
-	/* All counts are zero, remove this entry. */
+	// All counts are zero, remove this entry.
 	for (i = 0; i < DB_COUNT; ++i)
 	    if (tp->tp_diffbuf[i] != NULL && dp->df_count[i] != 0)
 		break;
@@ -511,7 +511,7 @@
 	}
 	else
 	{
-	    /* Advance to next entry. */
+	    // Advance to next entry.
 	    dprev = dp;
 	    dp = dp->df_next;
 	}
@@ -523,9 +523,9 @@
 	// Don't redraw right away, this updates the diffs, which can be slow.
 	need_diff_redraw = TRUE;
 
-	/* Need to recompute the scroll binding, may remove or add filler
-	 * lines (e.g., when adding lines above w_topline). But it's slow when
-	 * making many changes, postpone until redrawing. */
+	// Need to recompute the scroll binding, may remove or add filler
+	// lines (e.g., when adding lines above w_topline). But it's slow when
+	// making many changes, postpone until redrawing.
 	diff_need_scrollbind = TRUE;
     }
 }
@@ -565,27 +565,27 @@
     char_u	*line_org;
     int		dir = FORWARD;
 
-    /* Find the first buffers, use it as the original, compare the other
-     * buffer lines against this one. */
+    // Find the first buffers, use it as the original, compare the other
+    // buffer lines against this one.
     for (i_org = 0; i_org < DB_COUNT; ++i_org)
 	if (tp->tp_diffbuf[i_org] != NULL)
 	    break;
-    if (i_org == DB_COUNT)	/* safety check */
+    if (i_org == DB_COUNT)	// safety check
 	return;
 
     if (diff_check_sanity(tp, dp) == FAIL)
 	return;
 
-    /* First check lines at the top, then at the bottom. */
+    // First check lines at the top, then at the bottom.
     off_org = 0;
     off_new = 0;
     for (;;)
     {
-	/* Repeat until a line is found which is different or the number of
-	 * lines has become zero. */
+	// Repeat until a line is found which is different or the number of
+	// lines has become zero.
 	while (dp->df_count[i_org] > 0)
 	{
-	    /* Copy the line, the next ml_get() will invalidate it.  */
+	    // Copy the line, the next ml_get() will invalidate it.
 	    if (dir == BACKWARD)
 		off_org = dp->df_count[i_org] - 1;
 	    line_org = vim_strsave(ml_get_buf(tp->tp_diffbuf[i_org],
@@ -598,7 +598,7 @@
 		    continue;
 		if (dir == BACKWARD)
 		    off_new = dp->df_count[i_new] - 1;
-		/* if other buffer doesn't have this line, it was inserted */
+		// if other buffer doesn't have this line, it was inserted
 		if (off_new < 0 || off_new >= dp->df_count[i_new])
 		    break;
 		if (diff_cmp(line_org, ml_get_buf(tp->tp_diffbuf[i_new],
@@ -607,11 +607,11 @@
 	    }
 	    vim_free(line_org);
 
-	    /* Stop when a line isn't equal in all diff buffers. */
+	    // Stop when a line isn't equal in all diff buffers.
 	    if (i_new != DB_COUNT)
 		break;
 
-	    /* Line matched in all buffers, remove it from the diff. */
+	    // Line matched in all buffers, remove it from the diff.
 	    for (i_new = i_org; i_new < DB_COUNT; ++i_new)
 		if (tp->tp_diffbuf[i_new] != NULL)
 		{
@@ -662,8 +662,8 @@
 	    if (dofold && foldmethodIsDiff(wp))
 		foldUpdateAll(wp);
 #endif
-	    /* A change may have made filler lines invalid, need to take care
-	     * of that for other windows. */
+	    // A change may have made filler lines invalid, need to take care
+	    // of that for other windows.
 	    n = diff_check(wp, wp->w_topline);
 	    if ((wp != curwin && wp->w_topfill > 0) || n > 0)
 	    {
@@ -1003,7 +1003,7 @@
 
 		    for (;;)
 		    {
-			/* There must be a line that contains "1c1". */
+			// There must be a line that contains "1c1".
 			if (vim_fgets(linebuf, LBUFLEN, fd))
 			    break;
 			if (STRNCMP(linebuf, "1c1", 3) == 0)
@@ -1018,13 +1018,13 @@
 	}
 
 #ifdef FEAT_EVAL
-	/* When using 'diffexpr' break here. */
+	// When using 'diffexpr' break here.
 	if (*p_dex != NUL)
 	    break;
 #endif
 
 #if defined(MSWIN)
-	/* If the "-a" argument works, also check if "--binary" works. */
+	// If the "-a" argument works, also check if "--binary" works.
 	if (ok && diff_a_works == MAYBE && diff_bin_works == MAYBE)
 	{
 	    diff_a_works = TRUE;
@@ -1033,18 +1033,18 @@
 	}
 	if (!ok && diff_a_works == TRUE && diff_bin_works == TRUE)
 	{
-	    /* Tried --binary, but it failed. "-a" works though. */
+	    // Tried --binary, but it failed. "-a" works though.
 	    diff_bin_works = FALSE;
 	    ok = TRUE;
 	}
 #endif
 
-	/* If we checked if "-a" works already, break here. */
+	// If we checked if "-a" works already, break here.
 	if (diff_a_works != MAYBE)
 	    break;
 	diff_a_works = ok;
 
-	/* If "-a" works break here, otherwise retry without "-a". */
+	// If "-a" works break here, otherwise retry without "-a".
 	if (ok)
 	    break;
     }
@@ -1172,12 +1172,12 @@
     void
 ex_diffpatch(exarg_T *eap)
 {
-    char_u	*tmp_orig;	/* name of original temp file */
-    char_u	*tmp_new;	/* name of patched temp file */
+    char_u	*tmp_orig;	// name of original temp file
+    char_u	*tmp_new;	// name of patched temp file
     char_u	*buf = NULL;
     size_t	buflen;
     win_T	*old_curwin = curwin;
-    char_u	*newname = NULL;	/* name of patched file buffer */
+    char_u	*newname = NULL;	// name of patched file buffer
 #ifdef UNIX
     char_u	dirbuf[MAXPATHL];
     char_u	*fullname = NULL;
@@ -1196,26 +1196,26 @@
 			 eap->arg, NULL, NULL,
 			 (char_u *)_(BROWSE_FILTER_ALL_FILES), NULL);
 	if (browseFile == NULL)
-	    return;		/* operation cancelled */
+	    return;		// operation cancelled
 	eap->arg = browseFile;
-	cmdmod.browse = FALSE;	/* don't let do_ecmd() browse again */
+	cmdmod.browse = FALSE;	// don't let do_ecmd() browse again
     }
 #endif
 
-    /* We need two temp file names. */
+    // We need two temp file names.
     tmp_orig = vim_tempname('o', FALSE);
     tmp_new = vim_tempname('n', FALSE);
     if (tmp_orig == NULL || tmp_new == NULL)
 	goto theend;
 
-    /* Write the current buffer to "tmp_orig". */
+    // Write the current buffer to "tmp_orig".
     if (buf_write(curbuf, tmp_orig, NULL,
 		(linenr_T)1, curbuf->b_ml.ml_line_count,
 				     NULL, FALSE, FALSE, FALSE, TRUE) == FAIL)
 	goto theend;
 
 #ifdef UNIX
-    /* Get the absolute path of the patchfile, changing directory below. */
+    // Get the absolute path of the patchfile, changing directory below.
     fullname = FullName_save(eap->arg, FALSE);
 #endif
     esc_name = vim_strsave_shellescape(
@@ -1231,11 +1231,11 @@
 	goto theend;
 
 #ifdef UNIX
-    /* Temporarily chdir to /tmp, to avoid patching files in the current
-     * directory when the patch file contains more than one patch.  When we
-     * have our own temp dir use that instead, it will be cleaned up when we
-     * exit (any .rej files created).  Don't change directory if we can't
-     * return to the current. */
+    // Temporarily chdir to /tmp, to avoid patching files in the current
+    // directory when the patch file contains more than one patch.  When we
+    // have our own temp dir use that instead, it will be cleaned up when we
+    // exit (any .rej files created).  Don't change directory if we can't
+    // return to the current.
     if (mch_dirname(dirbuf, MAXPATHL) != OK || mch_chdir((char *)dirbuf) != 0)
 	dirbuf[0] = NUL;
     else
@@ -1252,7 +1252,7 @@
 
 #ifdef FEAT_EVAL
     if (*p_pex != NUL)
-	/* Use 'patchexpr' to generate the new file. */
+	// Use 'patchexpr' to generate the new file.
 	eval_patch(tmp_orig,
 # ifdef UNIX
 		fullname != NULL ? fullname :
@@ -1261,11 +1261,11 @@
     else
 #endif
     {
-	/* Build the patch command and execute it.  Ignore errors.  Switch to
-	 * cooked mode to allow the user to respond to prompts. */
+	// Build the patch command and execute it.  Ignore errors.  Switch to
+	// cooked mode to allow the user to respond to prompts.
 	vim_snprintf((char *)buf, buflen, "patch -o %s %s < %s",
 						  tmp_new, tmp_orig, esc_name);
-	block_autocmds();	/* Avoid ShellCmdPost stuff */
+	block_autocmds();	// Avoid ShellCmdPost stuff
 	(void)call_shell(buf, SHELL_FILTER | SHELL_COOKED);
 	unblock_autocmds();
     }
@@ -1279,10 +1279,10 @@
     }
 #endif
 
-    /* patch probably has written over the screen */
+    // patch probably has written over the screen
     redraw_later(CLEAR);
 
-    /* Delete any .orig or .rej file created. */
+    // Delete any .orig or .rej file created.
     STRCPY(buf, tmp_new);
     STRCAT(buf, ".orig");
     mch_remove(buf);
@@ -1290,7 +1290,7 @@
     STRCAT(buf, ".rej");
     mch_remove(buf);
 
-    /* Only continue if the output file was created. */
+    // Only continue if the output file was created.
     if (mch_stat((char *)tmp_new, &st) < 0 || st.st_size == 0)
 	emsg(_("E816: Cannot read patch output"));
     else
@@ -1306,30 +1306,30 @@
 #ifdef FEAT_GUI
 	need_mouse_correct = TRUE;
 #endif
-	/* don't use a new tab page, each tab page has its own diffs */
+	// don't use a new tab page, each tab page has its own diffs
 	cmdmod.tab = 0;
 
 	if (win_split(0, (diff_flags & DIFF_VERTICAL) ? WSP_VERT : 0) != FAIL)
 	{
-	    /* Pretend it was a ":split fname" command */
+	    // Pretend it was a ":split fname" command
 	    eap->cmdidx = CMD_split;
 	    eap->arg = tmp_new;
 	    do_exedit(eap, old_curwin);
 
-	    /* check that split worked and editing tmp_new */
+	    // check that split worked and editing tmp_new
 	    if (curwin != old_curwin && win_valid(old_curwin))
 	    {
-		/* Set 'diff', 'scrollbind' on and 'wrap' off. */
+		// Set 'diff', 'scrollbind' on and 'wrap' off.
 		diff_win_options(curwin, TRUE);
 		diff_win_options(old_curwin, TRUE);
 
 		if (newname != NULL)
 		{
-		    /* do a ":file filename.new" on the patched buffer */
+		    // do a ":file filename.new" on the patched buffer
 		    eap->arg = newname;
 		    ex_file(eap);
 
-		    /* Do filetype detection with the new name. */
+		    // Do filetype detection with the new name.
 		    if (au_has_group((char_u *)"filetypedetect"))
 			do_cmdline_cmd((char_u *)":doau filetypedetect BufRead");
 		}
@@ -1369,35 +1369,35 @@
 #ifdef FEAT_GUI
     need_mouse_correct = TRUE;
 #endif
-    /* Need to compute w_fraction when no redraw happened yet. */
+    // Need to compute w_fraction when no redraw happened yet.
     validate_cursor();
     set_fraction(curwin);
 
-    /* don't use a new tab page, each tab page has its own diffs */
+    // don't use a new tab page, each tab page has its own diffs
     cmdmod.tab = 0;
 
     if (win_split(0, (diff_flags & DIFF_VERTICAL) ? WSP_VERT : 0) != FAIL)
     {
-	/* Pretend it was a ":split fname" command */
+	// Pretend it was a ":split fname" command
 	eap->cmdidx = CMD_split;
 	curwin->w_p_diff = TRUE;
 	do_exedit(eap, old_curwin);
 
-	if (curwin != old_curwin)		/* split must have worked */
+	if (curwin != old_curwin)		// split must have worked
 	{
-	    /* Set 'diff', 'scrollbind' on and 'wrap' off. */
+	    // Set 'diff', 'scrollbind' on and 'wrap' off.
 	    diff_win_options(curwin, TRUE);
 	    if (win_valid(old_curwin))
 	    {
 		diff_win_options(old_curwin, TRUE);
 
 		if (bufref_valid(&old_curbuf))
-		    /* Move the cursor position to that of the old window. */
+		    // Move the cursor position to that of the old window.
 		    curwin->w_cursor.lnum = diff_get_corresponding_line(
 			    old_curbuf.br_buf, old_curwin->w_cursor.lnum);
 	    }
-	    /* Now that lines are folded scroll to show the cursor at the same
-	     * relative position. */
+	    // Now that lines are folded scroll to show the cursor at the same
+	    // relative position.
 	    scroll_to_fraction(curwin, curwin->w_height);
 	}
     }
@@ -1409,7 +1409,7 @@
     void
 ex_diffthis(exarg_T *eap UNUSED)
 {
-    /* Set 'diff', 'scrollbind' on and 'wrap' off. */
+    // Set 'diff', 'scrollbind' on and 'wrap' off.
     diff_win_options(curwin, TRUE);
 }
 
@@ -1433,18 +1433,18 @@
     void
 diff_win_options(
     win_T	*wp,
-    int		addbuf)		/* Add buffer to diff. */
+    int		addbuf)		// Add buffer to diff.
 {
 # ifdef FEAT_FOLDING
     win_T *old_curwin = curwin;
 
-    /* close the manually opened folds */
+    // close the manually opened folds
     curwin = wp;
     newFoldLevel();
     curwin = old_curwin;
 # endif
 
-    /* Use 'scrollbind' and 'cursorbind' when available */
+    // Use 'scrollbind' and 'cursorbind' when available
     if (!wp->w_p_diff)
 	wp->w_p_scb_save = wp->w_p_scb;
     wp->w_p_scb = TRUE;
@@ -1473,12 +1473,12 @@
     wp->w_p_fen = TRUE;
     wp->w_p_fdl = 0;
     foldUpdateAll(wp);
-    /* make sure topline is not halfway a fold */
+    // make sure topline is not halfway a fold
     changed_window_setting_win(wp);
 # endif
     if (vim_strchr(p_sbo, 'h') == NULL)
 	do_cmdline_cmd((char_u *)"set sbo+=hor");
-    /* Save the current values, to be restored in ex_diffoff(). */
+    // Save the current values, to be restored in ex_diffoff().
     wp->w_p_diff_saved = TRUE;
 
     set_diff_option(wp, TRUE);
@@ -1502,9 +1502,9 @@
     {
 	if (eap->forceit ? wp->w_p_diff : wp == curwin)
 	{
-	    /* Set 'diff' off. If option values were saved in
-	     * diff_win_options(), restore the ones whose settings seem to have
-	     * been left over from diff mode.  */
+	    // Set 'diff' off. If option values were saved in
+	    // diff_win_options(), restore the ones whose settings seem to have
+	    // been left over from diff mode.
 	    set_diff_option(wp, FALSE);
 
 	    if (wp->w_p_diff_saved)
@@ -1526,8 +1526,8 @@
 		if (wp->w_p_fdl == 0)
 		    wp->w_p_fdl = wp->w_p_fdl_save;
 
-		/* Only restore 'foldenable' when 'foldmethod' is not
-		 * "manual", otherwise we continue to show the diff folds. */
+		// Only restore 'foldenable' when 'foldmethod' is not
+		// "manual", otherwise we continue to show the diff folds.
 		if (wp->w_p_fen)
 		    wp->w_p_fen = foldmethodIsManual(wp) ? FALSE
 							 : wp->w_p_fen_save;
@@ -1535,20 +1535,20 @@
 		foldUpdateAll(wp);
 #endif
 	    }
-	    /* remove filler lines */
+	    // remove filler lines
 	    wp->w_topfill = 0;
 
-	    /* make sure topline is not halfway a fold and cursor is
-	     * invalidated */
+	    // make sure topline is not halfway a fold and cursor is
+	    // invalidated
 	    changed_window_setting_win(wp);
 
-	    /* Note: 'sbo' is not restored, it's a global option. */
+	    // Note: 'sbo' is not restored, it's a global option.
 	    diff_buf_adjust(wp);
 	}
 	diffwin |= wp->w_p_diff;
     }
 
-    /* Also remove hidden buffers from the list. */
+    // Also remove hidden buffers from the list.
     if (eap->forceit)
 	diff_buf_clear();
 
@@ -1560,7 +1560,7 @@
 	diff_clear(curtab);
     }
 
-    /* Remove "hor" from from 'scrollopt' if there are no diff windows left. */
+    // Remove "hor" from from 'scrollopt' if there are no diff windows left.
     if (!diffwin && vim_strchr(p_sbo, 'h') != NULL)
 	do_cmdline_cmd((char_u *)"set sbo-=hor");
 }
@@ -1579,13 +1579,13 @@
     diff_T	*dprev = NULL;
     diff_T	*dp = curtab->tp_first_diff;
     diff_T	*dn, *dpl;
-    char_u	linebuf[LBUFLEN];   /* only need to hold the diff line */
+    char_u	linebuf[LBUFLEN];   // only need to hold the diff line
     char_u	*line;
     long	off;
     int		i;
     linenr_T	lnum_orig, lnum_new;
     long	count_orig, count_new;
-    int		notset = TRUE;	    /* block "*dp" not set yet */
+    int		notset = TRUE;	    // block "*dp" not set yet
     enum {
 	DIFF_ED,
 	DIFF_UNIFIED,
@@ -1829,7 +1829,7 @@
     int
 diff_check(win_T *wp, linenr_T lnum)
 {
-    int		idx;		/* index in tp_diffbuf[] for this buffer */
+    int		idx;		// index in tp_diffbuf[] for this buffer
     diff_T	*dp;
     int		maxcount;
     int		i;
@@ -1837,26 +1837,26 @@
     int		cmp;
 
     if (curtab->tp_diff_invalid)
-	ex_diffupdate(NULL);		/* update after a big change */
+	ex_diffupdate(NULL);		// update after a big change
 
-    if (curtab->tp_first_diff == NULL || !wp->w_p_diff)	/* no diffs at all */
+    if (curtab->tp_first_diff == NULL || !wp->w_p_diff)	// no diffs at all
 	return 0;
 
-    /* safety check: "lnum" must be a buffer line */
+    // safety check: "lnum" must be a buffer line
     if (lnum < 1 || lnum > buf->b_ml.ml_line_count + 1)
 	return 0;
 
     idx = diff_buf_idx(buf);
     if (idx == DB_COUNT)
-	return 0;		/* no diffs for buffer "buf" */
+	return 0;		// no diffs for buffer "buf"
 
 #ifdef FEAT_FOLDING
-    /* A closed fold never has filler lines. */
+    // A closed fold never has filler lines.
     if (hasFoldingWin(wp, lnum, NULL, NULL, TRUE, NULL))
 	return 0;
 #endif
 
-    /* search for a change that includes "lnum" in the list of diffblocks. */
+    // search for a change that includes "lnum" in the list of diffblocks.
     for (dp = curtab->tp_first_diff; dp != NULL; dp = dp->df_next)
 	if (lnum <= dp->df_lnum[idx] + dp->df_count[idx])
 	    break;
@@ -1867,9 +1867,9 @@
     {
 	int	zero = FALSE;
 
-	/* Changed or inserted line.  If the other buffers have a count of
-	 * zero, the lines were inserted.  If the other buffers have the same
-	 * count, check if the lines are identical. */
+	// Changed or inserted line.  If the other buffers have a count of
+	// zero, the lines were inserted.  If the other buffers have the same
+	// count, check if the lines are identical.
 	cmp = FALSE;
 	for (i = 0; i < DB_COUNT; ++i)
 	    if (i != idx && curtab->tp_diffbuf[i] != NULL)
@@ -1879,36 +1879,36 @@
 		else
 		{
 		    if (dp->df_count[i] != dp->df_count[idx])
-			return -1;	    /* nr of lines changed. */
+			return -1;	    // nr of lines changed.
 		    cmp = TRUE;
 		}
 	    }
 	if (cmp)
 	{
-	    /* Compare all lines.  If they are equal the lines were inserted
-	     * in some buffers, deleted in others, but not changed. */
+	    // Compare all lines.  If they are equal the lines were inserted
+	    // in some buffers, deleted in others, but not changed.
 	    for (i = 0; i < DB_COUNT; ++i)
 		if (i != idx && curtab->tp_diffbuf[i] != NULL
 						      && dp->df_count[i] != 0)
 		    if (!diff_equal_entry(dp, idx, i))
 			return -1;
 	}
-	/* If there is no buffer with zero lines then there is no difference
-	 * any longer.  Happens when making a change (or undo) that removes
-	 * the difference.  Can't remove the entry here, we might be halfway
-	 * updating the window.  Just report the text as unchanged.  Other
-	 * windows might still show the change though. */
+	// If there is no buffer with zero lines then there is no difference
+	// any longer.  Happens when making a change (or undo) that removes
+	// the difference.  Can't remove the entry here, we might be halfway
+	// updating the window.  Just report the text as unchanged.  Other
+	// windows might still show the change though.
 	if (zero == FALSE)
 	    return 0;
 	return -2;
     }
 
-    /* If 'diffopt' doesn't contain "filler", return 0. */
+    // If 'diffopt' doesn't contain "filler", return 0.
     if (!(diff_flags & DIFF_FILLER))
 	return 0;
 
-    /* Insert filler lines above the line just below the change.  Will return
-     * 0 when this buf had the max count. */
+    // Insert filler lines above the line just below the change.  Will return
+    // 0 when this buf had the max count.
     maxcount = 0;
     for (i = 0; i < DB_COUNT; ++i)
 	if (curtab->tp_diffbuf[i] != NULL && dp->df_count[i] > maxcount)
@@ -2035,7 +2035,7 @@
 {
     int		n;
 
-    /* be quick when there are no filler lines */
+    // be quick when there are no filler lines
     if (!(diff_flags & DIFF_FILLER))
 	return 0;
     n = diff_check(wp, lnum);
@@ -2061,36 +2061,36 @@
 
     fromidx = diff_buf_idx(frombuf);
     if (fromidx == DB_COUNT)
-	return;		/* safety check */
+	return;		// safety check
 
     if (curtab->tp_diff_invalid)
-	ex_diffupdate(NULL);		/* update after a big change */
+	ex_diffupdate(NULL);		// update after a big change
 
     towin->w_topfill = 0;
 
-    /* search for a change that includes "lnum" in the list of diffblocks. */
+    // search for a change that includes "lnum" in the list of diffblocks.
     for (dp = curtab->tp_first_diff; dp != NULL; dp = dp->df_next)
 	if (lnum <= dp->df_lnum[fromidx] + dp->df_count[fromidx])
 	    break;
     if (dp == NULL)
     {
-	/* After last change, compute topline relative to end of file; no
-	 * filler lines. */
+	// After last change, compute topline relative to end of file; no
+	// filler lines.
 	towin->w_topline = towin->w_buffer->b_ml.ml_line_count
 				       - (frombuf->b_ml.ml_line_count - lnum);
     }
     else
     {
-	/* Find index for "towin". */
+	// Find index for "towin".
 	toidx = diff_buf_idx(towin->w_buffer);
 	if (toidx == DB_COUNT)
-	    return;		/* safety check */
+	    return;		// safety check
 
 	towin->w_topline = lnum + (dp->df_lnum[toidx] - dp->df_lnum[fromidx]);
 	if (lnum >= dp->df_lnum[fromidx])
 	{
-	    /* Inside a change: compute filler lines. With three or more
-	     * buffers we need to know the largest count. */
+	    // Inside a change: compute filler lines. With three or more
+	    // buffers we need to know the largest count.
 	    max_count = 0;
 	    for (i = 0; i < DB_COUNT; ++i)
 		if (curtab->tp_diffbuf[i] != NULL
@@ -2099,24 +2099,24 @@
 
 	    if (dp->df_count[toidx] == dp->df_count[fromidx])
 	    {
-		/* same number of lines: use same filler count */
+		// same number of lines: use same filler count
 		towin->w_topfill = fromwin->w_topfill;
 	    }
 	    else if (dp->df_count[toidx] > dp->df_count[fromidx])
 	    {
 		if (lnum == dp->df_lnum[fromidx] + dp->df_count[fromidx])
 		{
-		    /* more lines in towin and fromwin doesn't show diff
-		     * lines, only filler lines */
+		    // more lines in towin and fromwin doesn't show diff
+		    // lines, only filler lines
 		    if (max_count - fromwin->w_topfill >= dp->df_count[toidx])
 		    {
-			/* towin also only shows filler lines */
+			// towin also only shows filler lines
 			towin->w_topline = dp->df_lnum[toidx]
 						       + dp->df_count[toidx];
 			towin->w_topfill = fromwin->w_topfill;
 		    }
 		    else
-			/* towin still has some diff lines to show */
+			// towin still has some diff lines to show
 			towin->w_topline = dp->df_lnum[toidx]
 					     + max_count - fromwin->w_topfill;
 		}
@@ -2124,16 +2124,16 @@
 	    else if (towin->w_topline >= dp->df_lnum[toidx]
 							+ dp->df_count[toidx])
 	    {
-		/* less lines in towin and no diff lines to show: compute
-		 * filler lines */
+		// less lines in towin and no diff lines to show: compute
+		// filler lines
 		towin->w_topline = dp->df_lnum[toidx] + dp->df_count[toidx];
 		if (diff_flags & DIFF_FILLER)
 		{
 		    if (lnum == dp->df_lnum[fromidx] + dp->df_count[fromidx])
-			/* fromwin is also out of diff lines */
+			// fromwin is also out of diff lines
 			towin->w_topfill = fromwin->w_topfill;
 		    else
-			/* fromwin has some diff lines */
+			// fromwin has some diff lines
 			towin->w_topfill = dp->df_lnum[fromidx]
 							   + max_count - lnum;
 		}
@@ -2141,7 +2141,7 @@
 	}
     }
 
-    /* safety check (if diff info gets outdated strange things may happen) */
+    // safety check (if diff info gets outdated strange things may happen)
     towin->w_botfill = FALSE;
     if (towin->w_topline > towin->w_buffer->b_ml.ml_line_count)
     {
@@ -2154,7 +2154,7 @@
 	towin->w_topfill = 0;
     }
 
-    /* When w_topline changes need to recompute w_botline and cursor position */
+    // When w_topline changes need to recompute w_botline and cursor position
     invalidate_botline_win(towin);
     changed_line_abv_curs_win(towin);
 
@@ -2287,7 +2287,7 @@
 
     diff_algorithm_new |= diff_indent_heuristic;
 
-    /* Can't have both "horizontal" and "vertical". */
+    // Can't have both "horizontal" and "vertical".
     if ((diff_flags_new & DIFF_HORIZONTAL) && (diff_flags_new & DIFF_VERTICAL))
 	return FAIL;
 
@@ -2304,8 +2304,8 @@
 
     diff_redraw(TRUE);
 
-    /* recompute the scroll binding with the new option value, may
-     * remove or add filler lines */
+    // recompute the scroll binding with the new option value, may
+    // remove or add filler lines
     check_scrollbind((linenr_T)0, 0L);
 
     return OK;
@@ -2346,8 +2346,8 @@
 diff_find_change(
     win_T	*wp,
     linenr_T	lnum,
-    int		*startp,	/* first char of the change */
-    int		*endp)		/* last char of the change */
+    int		*startp,	// first char of the change
+    int		*endp)		// last char of the change
 {
     char_u	*line_org;
     char_u	*line_new;
@@ -2361,19 +2361,19 @@
     char_u	*p1, *p2;
     int		l;
 
-    /* Make a copy of the line, the next ml_get() will invalidate it. */
+    // Make a copy of the line, the next ml_get() will invalidate it.
     line_org = vim_strsave(ml_get_buf(wp->w_buffer, lnum, FALSE));
     if (line_org == NULL)
 	return FALSE;
 
     idx = diff_buf_idx(wp->w_buffer);
-    if (idx == DB_COUNT)	/* cannot happen */
+    if (idx == DB_COUNT)	// cannot happen
     {
 	vim_free(line_org);
 	return FALSE;
     }
 
-    /* search for a change that includes "lnum" in the list of diffblocks. */
+    // search for a change that includes "lnum" in the list of diffblocks.
     for (dp = curtab->tp_first_diff; dp != NULL; dp = dp->df_next)
 	if (lnum <= dp->df_lnum[idx] + dp->df_count[idx])
 	    break;
@@ -2388,14 +2388,14 @@
     for (i = 0; i < DB_COUNT; ++i)
 	if (curtab->tp_diffbuf[i] != NULL && i != idx)
 	{
-	    /* Skip lines that are not in the other change (filler lines). */
+	    // Skip lines that are not in the other change (filler lines).
 	    if (off >= dp->df_count[i])
 		continue;
 	    added = FALSE;
 	    line_new = ml_get_buf(curtab->tp_diffbuf[i],
 						 dp->df_lnum[i] + off, FALSE);
 
-	    /* Search for start of difference */
+	    // Search for start of difference
 	    si_org = si_new = 0;
 	    while (line_org[si_org] != NUL)
 	    {
@@ -2420,15 +2420,15 @@
 	    }
 	    if (has_mbyte)
 	    {
-		/* Move back to first byte of character in both lines (may
-		 * have "nn^" in line_org and "n^ in line_new). */
+		// Move back to first byte of character in both lines (may
+		// have "nn^" in line_org and "n^ in line_new).
 		si_org -= (*mb_head_off)(line_org, line_org + si_org);
 		si_new -= (*mb_head_off)(line_new, line_new + si_new);
 	    }
 	    if (*startp > si_org)
 		*startp = si_org;
 
-	    /* Search for end of difference, if any. */
+	    // Search for end of difference, if any.
 	    if (line_org[si_org] != NUL || line_new[si_new] != NUL)
 	    {
 		ei_org = (int)STRLEN(line_org);
@@ -2485,7 +2485,7 @@
     int		other = FALSE;
     diff_T	*dp;
 
-    /* Return if 'diff' isn't set. */
+    // Return if 'diff' isn't set.
     if (!wp->w_p_diff)
 	return FALSE;
 
@@ -2497,23 +2497,23 @@
 	    other = TRUE;
     }
 
-    /* return here if there are no diffs in the window */
+    // return here if there are no diffs in the window
     if (idx == -1 || !other)
 	return FALSE;
 
     if (curtab->tp_diff_invalid)
-	ex_diffupdate(NULL);		/* update after a big change */
+	ex_diffupdate(NULL);		// update after a big change
 
-    /* Return if there are no diff blocks.  All lines will be folded. */
+    // Return if there are no diff blocks.  All lines will be folded.
     if (curtab->tp_first_diff == NULL)
 	return TRUE;
 
     for (dp = curtab->tp_first_diff; dp != NULL; dp = dp->df_next)
     {
-	/* If this change is below the line there can't be any further match. */
+	// If this change is below the line there can't be any further match.
 	if (dp->df_lnum[idx] - diff_context > lnum)
 	    break;
-	/* If this change ends before the line we have a match. */
+	// If this change ends before the line we have a match.
 	if (dp->df_lnum[idx] + dp->df_count[idx] + diff_context > lnum)
 	    return FALSE;
     }
@@ -2581,7 +2581,7 @@
     int		buf_empty;
     int		found_not_ma = FALSE;
 
-    /* Find the current buffer in the list of diff buffers. */
+    // Find the current buffer in the list of diff buffers.
     idx_cur = diff_buf_idx(curbuf);
     if (idx_cur == DB_COUNT)
     {
@@ -2591,7 +2591,7 @@
 
     if (*eap->arg == NUL)
     {
-	/* No argument: Find the other buffer in the list of diff buffers. */
+	// No argument: Find the other buffer in the list of diff buffers.
 	for (idx_other = 0; idx_other < DB_COUNT; ++idx_other)
 	    if (curtab->tp_diffbuf[idx_other] != curbuf
 		    && curtab->tp_diffbuf[idx_other] != NULL)
@@ -2610,7 +2610,7 @@
 	    return;
 	}
 
-	/* Check that there isn't a third buffer in the list */
+	// Check that there isn't a third buffer in the list
 	for (i = idx_other + 1; i < DB_COUNT; ++i)
 	    if (curtab->tp_diffbuf[i] != curbuf
 		    && curtab->tp_diffbuf[i] != NULL
@@ -2622,19 +2622,19 @@
     }
     else
     {
-	/* Buffer number or pattern given.  Ignore trailing white space. */
+	// Buffer number or pattern given.  Ignore trailing white space.
 	p = eap->arg + STRLEN(eap->arg);
 	while (p > eap->arg && VIM_ISWHITE(p[-1]))
 	    --p;
 	for (i = 0; vim_isdigit(eap->arg[i]) && eap->arg + i < p; ++i)
 	    ;
-	if (eap->arg + i == p)	    /* digits only */
+	if (eap->arg + i == p)	    // digits only
 	    i = atol((char *)eap->arg);
 	else
 	{
 	    i = buflist_findpat(eap->arg, p, FALSE, TRUE, FALSE);
 	    if (i < 0)
-		return;		/* error message already given */
+		return;		// error message already given
 	}
 	buf = buflist_findnr(i);
 	if (buf == NULL)
@@ -2643,7 +2643,7 @@
 	    return;
 	}
 	if (buf == curbuf)
-	    return;		/* nothing to do */
+	    return;		// nothing to do
 	idx_other = diff_buf_idx(buf);
 	if (idx_other == DB_COUNT)
 	{
@@ -2654,11 +2654,11 @@
 
     diff_busy = TRUE;
 
-    /* When no range given include the line above or below the cursor. */
+    // When no range given include the line above or below the cursor.
     if (eap->addr_count == 0)
     {
-	/* Make it possible that ":diffget" on the last line gets line below
-	 * the cursor line when there is no difference above the cursor. */
+	// Make it possible that ":diffget" on the last line gets line below
+	// the cursor line when there is no difference above the cursor.
 	if (eap->cmdidx == CMD_diffget
 		&& eap->line1 == curbuf->b_ml.ml_line_count
 		&& diff_check(curwin, eap->line1) == 0
@@ -2677,15 +2677,15 @@
     {
 	idx_from = idx_cur;
 	idx_to = idx_other;
-	/* Need to make the other buffer the current buffer to be able to make
-	 * changes in it. */
-	/* set curwin/curbuf to buf and save a few things */
+	// Need to make the other buffer the current buffer to be able to make
+	// changes in it.
+	// set curwin/curbuf to buf and save a few things
 	aucmd_prepbuf(&aco, curtab->tp_diffbuf[idx_other]);
     }
 
-    /* May give the warning for a changed buffer here, which can trigger the
-     * FileChangedRO autocommand, which may do nasty things and mess
-     * everything up. */
+    // May give the warning for a changed buffer here, which can trigger the
+    // FileChangedRO autocommand, which may do nasty things and mess
+    // everything up.
     if (!curbuf->b_changed)
     {
 	change_warning(0);
@@ -2700,7 +2700,7 @@
     for (dp = curtab->tp_first_diff; dp != NULL; )
     {
 	if (dp->df_lnum[idx_cur] > eap->line2 + off)
-	    break;	/* past the range that was specified */
+	    break;	// past the range that was specified
 
 	dfree = NULL;
 	lnum = dp->df_lnum[idx_to];
@@ -2708,16 +2708,16 @@
 	if (dp->df_lnum[idx_cur] + dp->df_count[idx_cur] > eap->line1 + off
 		&& u_save(lnum - 1, lnum + count) != FAIL)
 	{
-	    /* Inside the specified range and saving for undo worked. */
+	    // Inside the specified range and saving for undo worked.
 	    start_skip = 0;
 	    end_skip = 0;
 	    if (eap->addr_count > 0)
 	    {
-		/* A range was specified: check if lines need to be skipped. */
+		// A range was specified: check if lines need to be skipped.
 		start_skip = eap->line1 + off - dp->df_lnum[idx_cur];
 		if (start_skip > 0)
 		{
-		    /* range starts below start of current diff block */
+		    // range starts below start of current diff block
 		    if (start_skip > count)
 		    {
 			lnum += count;
@@ -2736,14 +2736,14 @@
 							 - (eap->line2 + off);
 		if (end_skip > 0)
 		{
-		    /* range ends above end of current/from diff block */
-		    if (idx_cur == idx_from)	/* :diffput */
+		    // range ends above end of current/from diff block
+		    if (idx_cur == idx_from)	// :diffput
 		    {
 			i = dp->df_count[idx_cur] - start_skip - end_skip;
 			if (count > i)
 			    count = i;
 		    }
-		    else			/* :diffget */
+		    else			// :diffget
 		    {
 			count -= end_skip;
 			end_skip = dp->df_count[idx_from] - start_skip - count;
@@ -2759,7 +2759,7 @@
 	    added = 0;
 	    for (i = 0; i < count; ++i)
 	    {
-		/* remember deleting the last line of the buffer */
+		// remember deleting the last line of the buffer
 		buf_empty = curbuf->b_ml.ml_line_count == 1;
 		ml_delete(lnum, FALSE);
 		--added;
@@ -2780,8 +2780,8 @@
 		    ++added;
 		    if (buf_empty && curbuf->b_ml.ml_line_count == 2)
 		    {
-			/* Added the first line into an empty buffer, need to
-			 * delete the dummy empty line. */
+			// Added the first line into an empty buffer, need to
+			// delete the dummy empty line.
 			buf_empty = FALSE;
 			ml_delete((linenr_T)2, FALSE);
 		    }
@@ -2792,8 +2792,8 @@
 
 	    if (start_skip == 0 && end_skip == 0)
 	    {
-		/* Check if there are any other buffers and if the diff is
-		 * equal in them. */
+		// Check if there are any other buffers and if the diff is
+		// equal in them.
 		for (i = 0; i < DB_COUNT; ++i)
 		    if (curtab->tp_diffbuf[i] != NULL && i != idx_from
 								&& i != idx_to
@@ -2801,7 +2801,7 @@
 			break;
 		if (i == DB_COUNT)
 		{
-		    /* delete the diff entry, the buffers are now equal here */
+		    // delete the diff entry, the buffers are now equal here
 		    dfree = dp;
 		    dp = dp->df_next;
 		    if (dprev == NULL)
@@ -2811,14 +2811,14 @@
 		}
 	    }
 
-	    /* Adjust marks.  This will change the following entries! */
+	    // Adjust marks.  This will change the following entries!
 	    if (added != 0)
 	    {
 		mark_adjust(lnum, lnum + count - 1, (long)MAXLNUM, (long)added);
 		if (curwin->w_cursor.lnum >= lnum)
 		{
-		    /* Adjust the cursor position if it's in/after the changed
-		     * lines. */
+		    // Adjust the cursor position if it's in/after the changed
+		    // lines.
 		    if (curwin->w_cursor.lnum >= lnum + count)
 			curwin->w_cursor.lnum += added;
 		    else if (added < 0)
@@ -2829,22 +2829,22 @@
 
 	    if (dfree != NULL)
 	    {
-		/* Diff is deleted, update folds in other windows. */
+		// Diff is deleted, update folds in other windows.
 #ifdef FEAT_FOLDING
 		diff_fold_update(dfree, idx_to);
 #endif
 		vim_free(dfree);
 	    }
 	    else
-		/* mark_adjust() may have changed the count in a wrong way */
+		// mark_adjust() may have changed the count in a wrong way
 		dp->df_count[idx_to] = new_count;
 
-	    /* When changing the current buffer, keep track of line numbers */
+	    // When changing the current buffer, keep track of line numbers
 	    if (idx_cur == idx_to)
 		off += added;
 	}
 
-	/* If before the range or not deleted, go to next diff. */
+	// If before the range or not deleted, go to next diff.
 	if (dfree == NULL)
 	{
 	    dprev = dp;
@@ -2852,12 +2852,12 @@
 	}
     }
 
-    /* restore curwin/curbuf and a few other things */
+    // restore curwin/curbuf and a few other things
     if (eap->cmdidx != CMD_diffget)
     {
-	/* Syncing undo only works for the current buffer, but we change
-	 * another buffer.  Sync undo if the command was typed.  This isn't
-	 * 100% right when ":diffput" is used in a function or mapping. */
+	// Syncing undo only works for the current buffer, but we change
+	// another buffer.  Sync undo if the command was typed.  This isn't
+	// 100% right when ":diffput" is used in a function or mapping.
 	if (KeyTyped)
 	    u_sync(FALSE);
 	aucmd_restbuf(&aco);
@@ -2935,14 +2935,14 @@
 	return FAIL;
 
     if (curtab->tp_diff_invalid)
-	ex_diffupdate(NULL);		/* update after a big change */
+	ex_diffupdate(NULL);		// update after a big change
 
-    if (curtab->tp_first_diff == NULL)		/* no diffs today */
+    if (curtab->tp_first_diff == NULL)		// no diffs today
 	return FAIL;
 
     while (--count >= 0)
     {
-	/* Check if already before first diff. */
+	// Check if already before first diff.
 	if (dir == BACKWARD && lnum <= curtab->tp_first_diff->df_lnum[idx])
 	    break;
 
@@ -2961,11 +2961,11 @@
 	}
     }
 
-    /* don't end up past the end of the file */
+    // don't end up past the end of the file
     if (lnum > curbuf->b_ml.ml_line_count)
 	lnum = curbuf->b_ml.ml_line_count;
 
-    /* When the cursor didn't move at all we fail. */
+    // When the cursor didn't move at all we fail.
     if (lnum == curwin->w_cursor.lnum)
 	return FAIL;
 
@@ -2996,9 +2996,9 @@
 	return lnum1;
 
     if (curtab->tp_diff_invalid)
-	ex_diffupdate(NULL);		/* update after a big change */
+	ex_diffupdate(NULL);		// update after a big change
 
-    if (curtab->tp_first_diff == NULL)		/* no diffs today */
+    if (curtab->tp_first_diff == NULL)		// no diffs today
 	return lnum1;
 
     for (dp = curtab->tp_first_diff; dp != NULL; dp = dp->df_next)
@@ -3007,7 +3007,7 @@
 	    return lnum1 - baseline;
 	if ((dp->df_lnum[idx1] + dp->df_count[idx1]) > lnum1)
 	{
-	    /* Inside the diffblock */
+	    // Inside the diffblock
 	    baseline = lnum1 - dp->df_lnum[idx1];
 	    if (baseline > dp->df_count[idx2])
 		baseline = dp->df_count[idx2];
@@ -3031,7 +3031,7 @@
 				   - (dp->df_lnum[idx2] + dp->df_count[idx2]);
     }
 
-    /* If we get here then the cursor is after the last diff */
+    // If we get here then the cursor is after the last diff
     return lnum1 - baseline;
 }
 
@@ -3044,7 +3044,7 @@
 {
     linenr_T lnum = diff_get_corresponding_line_int(buf1, lnum1);
 
-    /* don't end up past the end of the file */
+    // don't end up past the end of the file
     if (lnum > curbuf->b_ml.ml_line_count)
 	return curbuf->b_ml.ml_line_count;
     return lnum;
@@ -3063,25 +3063,25 @@
     linenr_T	n;
 
     idx = diff_buf_idx(curbuf);
-    if (idx == DB_COUNT)		/* safety check */
+    if (idx == DB_COUNT)		// safety check
 	return (linenr_T)0;
 
     if (curtab->tp_diff_invalid)
-	ex_diffupdate(NULL);		/* update after a big change */
+	ex_diffupdate(NULL);		// update after a big change
 
-    /* search for a change that includes "lnum" in the list of diffblocks. */
+    // search for a change that includes "lnum" in the list of diffblocks.
     for (dp = curtab->tp_first_diff; dp != NULL; dp = dp->df_next)
 	if (lnum <= dp->df_lnum[idx] + dp->df_count[idx])
 	    break;
 
-    /* When after the last change, compute relative to the last line number. */
+    // When after the last change, compute relative to the last line number.
     if (dp == NULL)
 	return wp->w_buffer->b_ml.ml_line_count
 					- (curbuf->b_ml.ml_line_count - lnum);
 
-    /* Find index for "wp". */
+    // Find index for "wp".
     i = diff_buf_idx(wp->w_buffer);
-    if (i == DB_COUNT)			/* safety check */
+    if (i == DB_COUNT)			// safety check
 	return (linenr_T)0;
 
     n = lnum + (dp->df_lnum[i] - dp->df_lnum[idx]);
@@ -3276,13 +3276,13 @@
     int			filler_lines;
     int			col;
 
-    if (lnum < 0)	/* ignore type error in {lnum} arg */
+    if (lnum < 0)	// ignore type error in {lnum} arg
 	lnum = 0;
     if (lnum != prev_lnum
 	    || changedtick != CHANGEDTICK(curbuf)
 	    || fnum != curbuf->b_fnum)
     {
-	/* New line, buffer, change: need to get the values. */
+	// New line, buffer, change: need to get the values.
 	filler_lines = diff_check(curwin, lnum);
 	if (filler_lines < 0)
 	{
@@ -3291,12 +3291,12 @@
 		change_start = MAXCOL;
 		change_end = -1;
 		if (diff_find_change(curwin, lnum, &change_start, &change_end))
-		    hlID = HLF_ADD;	/* added line */
+		    hlID = HLF_ADD;	// added line
 		else
-		    hlID = HLF_CHD;	/* changed line */
+		    hlID = HLF_CHD;	// changed line
 	    }
 	    else
-		hlID = HLF_ADD;	/* added line */
+		hlID = HLF_ADD;	// added line
 	}
 	else
 	    hlID = (hlf_T)0;
@@ -3307,11 +3307,11 @@
 
     if (hlID == HLF_CHD || hlID == HLF_TXD)
     {
-	col = tv_get_number(&argvars[1]) - 1; /* ignore type error in {col} */
+	col = tv_get_number(&argvars[1]) - 1; // ignore type error in {col}
 	if (col >= change_start && col <= change_end)
-	    hlID = HLF_TXD;			/* changed text */
+	    hlID = HLF_TXD;			// changed text
 	else
-	    hlID = HLF_CHD;			/* changed line */
+	    hlID = HLF_CHD;			// changed line
     }
     rettv->vval.v_number = hlID == (hlf_T)0 ? 0 : (int)hlID;
 #endif
diff --git a/src/digraph.c b/src/digraph.c
index 758c23d..dd5920a 100644
--- a/src/digraph.c
+++ b/src/digraph.c
@@ -26,7 +26,7 @@
 
 static void printdigraph(digr_T *dp, result_T *previous);
 
-/* digraphs added by the user */
+// digraphs added by the user
 static garray_T	user_digraphs = {0, 0, (int)sizeof(digr_T), 10, NULL};
 
 /*
@@ -39,171 +39,171 @@
 	/*
 	 * ATARI digraphs
 	 */
-       {{'C', ',', 128},	/* ~@ XX */
-	{'u', '"', 129},	/*  */
-	{'e', '\'', 130},	/*  */
-	{'a', '^', 131},	/*  */
-	{'a', '"', 132},	/*  */
-	{'a', '`', 133},	/*  */
-	{'a', '@', 134},	/*  */
-	{'c', ',', 135},	/* ~G XX */
-	{'e', '^', 136},	/* ~H XX */
-	{'e', '"', 137},	/*  */
-	{'e', '`', 138},	/*  */
-	{'i', '"', 139},	/*  */
-	{'i', '^', 140},	/*  */
-	{'i', '`', 141},	/*  */
-	{'A', '"', 142},	/*  */
-	{'A', '@', 143},	/*  */
-	{'E', '\'', 144},	/*  */
-	{'a', 'e', 145},	/*  */
-	{'A', 'E', 146},	/*  */
-	{'o', '^', 147},	/*  */
-	{'o', '"', 148},	/*  */
-	{'o', '`', 149},	/*  */
-	{'u', '^', 150},	/*  */
-	{'u', '`', 151},	/*  */
-	{'y', '"', 152},	/*  */
-	{'O', '"', 153},	/*  */
-	{'U', '"', 154},	/*  */
-	{'c', '|', 155},	/*  */
-	{'$', '$', 156},	/*  */
-	{'Y', '-', 157},	/* ~] XX */
-	{'s', 's', 158},	/*  */
-	{'f', 'f', 159},	/*  */
-	{'a', '\'', 160},	/*   */
-	{'i', '\'', 161},	/* ¡ */
-	{'o', '\'', 162},	/* ¢ */
-	{'u', '\'', 163},	/* £ */
-	{'n', '~', 164},	/* ¤ */
-	{'N', '~', 165},	/* ¥ */
-	{'a', 'a', 166},	/* ¦ */
-	{'o', 'o', 167},	/* § */
-	{'~', '?', 168},	/* ¨ */
-	{'-', 'a', 169},	/* © */
-	{'a', '-', 170},	/* ª */
-	{'1', '2', 171},	/* « */
-	{'1', '4', 172},	/* ¬ */
-	{'~', '!', 173},	/* ­ */
-	{'<', '<', 174},	/* ® */
-	{'>', '>', 175},	/* ¯ */
-	{'j', 'u', 230},	/* æ */
-	{'o', '/', 237},	/* í */
-	{'+', '-', 241},	/* ñ */
-	{'>', '=', 242},	/* ò */
-	{'<', '=', 243},	/* ó */
-	{':', '-', 246},	/* ö */
-	{'~', '~', 247},	/* ÷ */
-	{'~', 'o', 248},	/* ø */
-	{'2', '2', 253},	/* ý */
+       {{'C', ',', 128},	// ~@ XX
+	{'u', '"', 129},	// 
+	{'e', '\'', 130},	// 
+	{'a', '^', 131},	// 
+	{'a', '"', 132},	// 
+	{'a', '`', 133},	// 
+	{'a', '@', 134},	// 
+	{'c', ',', 135},	// ~G XX
+	{'e', '^', 136},	// ~H XX
+	{'e', '"', 137},	// 
+	{'e', '`', 138},	// 
+	{'i', '"', 139},	// 
+	{'i', '^', 140},	// 
+	{'i', '`', 141},	// 
+	{'A', '"', 142},	// 
+	{'A', '@', 143},	// 
+	{'E', '\'', 144},	// 
+	{'a', 'e', 145},	// 
+	{'A', 'E', 146},	// 
+	{'o', '^', 147},	// 
+	{'o', '"', 148},	// 
+	{'o', '`', 149},	// 
+	{'u', '^', 150},	// 
+	{'u', '`', 151},	// 
+	{'y', '"', 152},	// 
+	{'O', '"', 153},	// 
+	{'U', '"', 154},	// 
+	{'c', '|', 155},	// 
+	{'$', '$', 156},	// 
+	{'Y', '-', 157},	// ~] XX
+	{'s', 's', 158},	// 
+	{'f', 'f', 159},	// 
+	{'a', '\'', 160},	//  
+	{'i', '\'', 161},	// ¡
+	{'o', '\'', 162},	// ¢
+	{'u', '\'', 163},	// £
+	{'n', '~', 164},	// ¤
+	{'N', '~', 165},	// ¥
+	{'a', 'a', 166},	// ¦
+	{'o', 'o', 167},	// §
+	{'~', '?', 168},	// ¨
+	{'-', 'a', 169},	// ©
+	{'a', '-', 170},	// ª
+	{'1', '2', 171},	// «
+	{'1', '4', 172},	// ¬
+	{'~', '!', 173},	// ­
+	{'<', '<', 174},	// ®
+	{'>', '>', 175},	// ¯
+	{'j', 'u', 230},	// æ
+	{'o', '/', 237},	// í
+	{'+', '-', 241},	// ñ
+	{'>', '=', 242},	// ò
+	{'<', '=', 243},	// ó
+	{':', '-', 246},	// ö
+	{'~', '~', 247},	// ÷
+	{'~', 'o', 248},	// ø
+	{'2', '2', 253},	// ý
 	{NUL, NUL, NUL}
 	};
 
-#else	/* !__MINT__ */
+#else	// !__MINT__
 # ifdef HPUX_DIGRAPHS
 
 	/*
 	 * different HPUX digraphs
 	 */
-       {{'A', '`', 161},	/* ¡ */
-	{'A', '^', 162},	/* ¢ */
-	{'E', '`', 163},	/* £ */
-	{'E', '^', 164},	/* ¤ */
-	{'E', '"', 165},	/* ¥ */
-	{'I', '^', 166},	/* ¦ */
-	{'I', '"', 167},	/* § */
-	{'\'', '\'', 168},	/* ¨ */
-	{'`', '`', 169},	/* © */
-	{'^', '^', 170},	/* ª */
-	{'"', '"', 171},	/* « */
-	{'~', '~', 172},	/* ¬ */
-	{'U', '`', 173},	/* ­ */
-	{'U', '^', 174},	/* ® */
-	{'L', '=', 175},	/* ¯ */
-	{'~', '_', 176},	/* ° */
-	{'Y', '\'', 177},	/* ± */
-	{'y', '\'', 178},	/* ² */
-	{'~', 'o', 179},	/* ³ */
-	{'C', ',', 180},	/* ´ */
-	{'c', ',', 181},	/* µ */
-	{'N', '~', 182},	/* ¶ */
-	{'n', '~', 183},	/* · */
-	{'~', '!', 184},	/* ¸ */
-	{'~', '?', 185},	/* ¹ */
-	{'o', 'x', 186},	/* º */
-	{'L', '-', 187},	/* » */
-	{'Y', '=', 188},	/* ¼ */
-	{'p', 'p', 189},	/* ½ */
-	{'f', 'l', 190},	/* ¾ */
-	{'c', '|', 191},	/* ¿ */
-	{'a', '^', 192},	/* À */
-	{'e', '^', 193},	/* Á */
-	{'o', '^', 194},	/* Â */
-	{'u', '^', 195},	/* Ã */
-	{'a', '\'', 196},	/* Ä */
-	{'e', '\'', 197},	/* Å */
-	{'o', '\'', 198},	/* Æ */
-	{'u', '\'', 199},	/* Ç */
-	{'a', '`', 200},	/* È */
-	{'e', '`', 201},	/* É */
-	{'o', '`', 202},	/* Ê */
-	{'u', '`', 203},	/* Ë */
-	{'a', '"', 204},	/* Ì */
-	{'e', '"', 205},	/* Í */
-	{'o', '"', 206},	/* Î */
-	{'u', '"', 207},	/* Ï */
-	{'A', 'o', 208},	/* Ð */
-	{'i', '^', 209},	/* Ñ */
-	{'O', '/', 210},	/* Ò */
-	{'A', 'E', 211},	/* Ó */
-	{'a', 'o', 212},	/* Ô */
-	{'i', '\'', 213},	/* Õ */
-	{'o', '/', 214},	/* Ö */
-	{'a', 'e', 215},	/* × */
-	{'A', '"', 216},	/* Ø */
-	{'i', '`', 217},	/* Ù */
-	{'O', '"', 218},	/* Ú */
-	{'U', '"', 219},	/* Û */
-	{'E', '\'', 220},	/* Ü */
-	{'i', '"', 221},	/* Ý */
-	{'s', 's', 222},	/* Þ */
-	{'O', '^', 223},	/* ß */
-	{'A', '\'', 224},	/* à */
-	{'A', '~', 225},	/* á */
-	{'a', '~', 226},	/* â */
-	{'D', '-', 227},	/* ã */
-	{'d', '-', 228},	/* ä */
-	{'I', '\'', 229},	/* å */
-	{'I', '`', 230},	/* æ */
-	{'O', '\'', 231},	/* ç */
-	{'O', '`', 232},	/* è */
-	{'O', '~', 233},	/* é */
-	{'o', '~', 234},	/* ê */
-	{'S', '~', 235},	/* ë */
-	{'s', '~', 236},	/* ì */
-	{'U', '\'', 237},	/* í */
-	{'Y', '"', 238},	/* î */
-	{'y', '"', 239},	/* ï */
-	{'p', '-', 240},	/* ð */
-	{'p', '~', 241},	/* ñ */
-	{'~', '.', 242},	/* ò */
-	{'j', 'u', 243},	/* ó */
-	{'P', 'p', 244},	/* ô */
-	{'3', '4', 245},	/* õ */
-	{'-', '-', 246},	/* ö */
-	{'1', '4', 247},	/* ÷ */
-	{'1', '2', 248},	/* ø */
-	{'a', '_', 249},	/* ù */
-	{'o', '_', 250},	/* ú */
-	{'<', '<', 251},	/* û */
-	{'x', 'x', 252},	/* ü */
-	{'>', '>', 253},	/* ý */
-	{'+', '-', 254},	/* þ */
-	{'n', 'u', 255},	/* x XX */
+       {{'A', '`', 161},	// ¡
+	{'A', '^', 162},	// ¢
+	{'E', '`', 163},	// £
+	{'E', '^', 164},	// ¤
+	{'E', '"', 165},	// ¥
+	{'I', '^', 166},	// ¦
+	{'I', '"', 167},	// §
+	{'\'', '\'', 168},	// ¨
+	{'`', '`', 169},	// ©
+	{'^', '^', 170},	// ª
+	{'"', '"', 171},	// «
+	{'~', '~', 172},	// ¬
+	{'U', '`', 173},	// ­
+	{'U', '^', 174},	// ®
+	{'L', '=', 175},	// ¯
+	{'~', '_', 176},	// °
+	{'Y', '\'', 177},	// ±
+	{'y', '\'', 178},	// ²
+	{'~', 'o', 179},	// ³
+	{'C', ',', 180},	// ´
+	{'c', ',', 181},	// µ
+	{'N', '~', 182},	// ¶
+	{'n', '~', 183},	// ·
+	{'~', '!', 184},	// ¸
+	{'~', '?', 185},	// ¹
+	{'o', 'x', 186},	// º
+	{'L', '-', 187},	// »
+	{'Y', '=', 188},	// ¼
+	{'p', 'p', 189},	// ½
+	{'f', 'l', 190},	// ¾
+	{'c', '|', 191},	// ¿
+	{'a', '^', 192},	// À
+	{'e', '^', 193},	// Á
+	{'o', '^', 194},	// Â
+	{'u', '^', 195},	// Ã
+	{'a', '\'', 196},	// Ä
+	{'e', '\'', 197},	// Å
+	{'o', '\'', 198},	// Æ
+	{'u', '\'', 199},	// Ç
+	{'a', '`', 200},	// È
+	{'e', '`', 201},	// É
+	{'o', '`', 202},	// Ê
+	{'u', '`', 203},	// Ë
+	{'a', '"', 204},	// Ì
+	{'e', '"', 205},	// Í
+	{'o', '"', 206},	// Î
+	{'u', '"', 207},	// Ï
+	{'A', 'o', 208},	// Ð
+	{'i', '^', 209},	// Ñ
+	{'O', '/', 210},	// Ò
+	{'A', 'E', 211},	// Ó
+	{'a', 'o', 212},	// Ô
+	{'i', '\'', 213},	// Õ
+	{'o', '/', 214},	// Ö
+	{'a', 'e', 215},	// ×
+	{'A', '"', 216},	// Ø
+	{'i', '`', 217},	// Ù
+	{'O', '"', 218},	// Ú
+	{'U', '"', 219},	// Û
+	{'E', '\'', 220},	// Ü
+	{'i', '"', 221},	// Ý
+	{'s', 's', 222},	// Þ
+	{'O', '^', 223},	// ß
+	{'A', '\'', 224},	// à
+	{'A', '~', 225},	// á
+	{'a', '~', 226},	// â
+	{'D', '-', 227},	// ã
+	{'d', '-', 228},	// ä
+	{'I', '\'', 229},	// å
+	{'I', '`', 230},	// æ
+	{'O', '\'', 231},	// ç
+	{'O', '`', 232},	// è
+	{'O', '~', 233},	// é
+	{'o', '~', 234},	// ê
+	{'S', '~', 235},	// ë
+	{'s', '~', 236},	// ì
+	{'U', '\'', 237},	// í
+	{'Y', '"', 238},	// î
+	{'y', '"', 239},	// ï
+	{'p', '-', 240},	// ð
+	{'p', '~', 241},	// ñ
+	{'~', '.', 242},	// ò
+	{'j', 'u', 243},	// ó
+	{'P', 'p', 244},	// ô
+	{'3', '4', 245},	// õ
+	{'-', '-', 246},	// ö
+	{'1', '4', 247},	// ÷
+	{'1', '2', 248},	// ø
+	{'a', '_', 249},	// ù
+	{'o', '_', 250},	// ú
+	{'<', '<', 251},	// û
+	{'x', 'x', 252},	// ü
+	{'>', '>', 253},	// ý
+	{'+', '-', 254},	// þ
+	{'n', 'u', 255},	// x XX
 	{NUL, NUL, NUL}
 	};
 
-# else	/* !HPUX_DIGRAPHS */
+# else	// !HPUX_DIGRAPHS
 
 #  ifdef EBCDIC
 
@@ -211,107 +211,107 @@
 	 * EBCDIC - ISO digraphs
 	 * TODO: EBCDIC Table is Code-Page 1047
 	 */
-       {{'a', '^',    66},	/* â */
-	{'a', '"',    67},	/* ä */
-	{'a', '`',    68},	/* à */
-	{'a', '\'',   69},	/* á */
-	{'a', '~',    70},	/* ã */
-	{'a', '@',    71},	/* å */
-	{'a', 'a',    71},	/* å */
-	{'c', ',',    72},	/* ç */
-	{'n', '~',    73},	/* ñ */
-	{'c', '|',    74},	/* ¢ */
-	{'e', '\'',   81},	/* é */
-	{'e', '^',    82},	/* ê */
-	{'e', '"',    83},	/* ë */
-	{'e', '`',    84},	/* è */
-	{'i', '\'',   85},	/* í */
-	{'i', '^',    86},	/* î */
-	{'i', '"',    87},	/* ï */
-	{'i', '`',    88},	/* ì */
-	{'s', 's',    89},	/* ß */
-	{'A', '^',    98},	/* Â */
-	{'A', '"',    99},	/* Ä */
-	{'A', '`',   100},	/* À */
-	{'A', '\'',  101},	/* Á */
-	{'A', '~',   102},	/* Ã */
-	{'A', '@',   103},	/* Å */
-	{'A', 'A',   103},	/* Å */
-	{'C', ',',   104},	/* Ç */
-	{'N', '~',   105},	/* Ñ */
-	{'|', '|',   106},	/* ¦ */
-	{'o', '/',   112},	/* ø */
-	{'E', '\'',  113},	/* É */
-	{'E', '^',   114},	/* Ê */
-	{'E', '"',   115},	/* Ë */
-	{'E', '`',   116},	/* È */
-	{'I', '\'',  117},	/* Í */
-	{'I', '^',   118},	/* Î */
-	{'I', '"',   119},	/* Ï */
-	{'I', '`',   120},	/* Ì */
-	{'O', '/',   128},	/* 0/ XX */
-	{'<', '<',   138},	/* « */
-	{'>', '>',   139},	/* » */
-	{'d', '-',   140},	/* ð */
-	{'y', '\'',  141},	/* ý */
-	{'i', 'p',   142},	/* þ */
-	{'+', '-',   143},	/* ± */
-	{'~', 'o',   144},	/* ° */
-	{'a', '-',   154},	/* ª */
-	{'o', '-',   155},	/* º */
-	{'a', 'e',   156},	/* æ */
-	{',', ',',   157},	/* , XX */
-	{'A', 'E',   158},	/* Æ */
-	{'o', 'x',   159},	/* ¤ - currency symbol in ISO 8859-1 */
-	{'e', '=',   159},	/* ¤ - euro symbol in ISO 8859-15 */
-	{'E', 'u',   159},	/* ¤ - euro symbol in ISO 8859-15 */
-	{'j', 'u',   160},	/* µ */
-	{'y', '"',   167},	/* x XX */
-	{'~', '!',   170},	/* ¡ */
-	{'~', '?',   171},	/* ¿ */
-	{'D', '-',   172},	/* Ð */
-	{'I', 'p',   174},	/* Þ */
-	{'r', 'O',   175},	/* ® */
-	{'-', ',',   176},	/* ¬ */
-	{'$', '$',   177},	/* £ */
-	{'Y', '-',   178},	/* ¥ */
-	{'~', '.',   179},	/* · */
-	{'c', 'O',   180},	/* © */
-	{'p', 'a',   181},	/* § */
-	{'p', 'p',   182},	/* ¶ */
-	{'1', '4',   183},	/* ¼ */
-	{'1', '2',   184},	/* ½ */
-	{'3', '4',   185},	/* ¾ */
-	{'Y', '\'',  186},	/* Ý */
-	{'"', '"',   187},	/* ¨ */
-	{'-', '=',   188},	/* ¯ */
-	{'\'', '\'', 190},	/* ´ */
-	{'O', 'E',   191},	/* × - OE in ISO 8859-15 */
-	{'/', '\\',  191},	/* × - multiplication symbol in ISO 8859-1 */
-	{'-', '-',   202},	/* ­ */
-	{'o', '^',   203},	/* ô */
-	{'o', '"',   204},	/* ö */
-	{'o', '`',   205},	/* ò */
-	{'o', '\'',  206},	/* ó */
-	{'o', '~',   207},	/* õ */
-	{'1', '1',   218},	/* ¹ */
-	{'u', '^',   219},	/* û */
-	{'u', '"',   220},	/* ü */
-	{'u', '`',   221},	/* ù */
-	{'u', '\'',  222},	/* ú */
-	{':', '-',   225},	/* ÷ - division symbol in ISO 8859-1 */
-	{'o', 'e',   225},	/* ÷ - oe in ISO 8859-15 */
-	{'2', '2',   234},	/* ² */
-	{'O', '^',   235},	/* Ô */
-	{'O', '"',   236},	/* Ö */
-	{'O', '`',   237},	/* Ò */
-	{'O', '\'',  238},	/* Ó */
-	{'O', '~',   239},	/* Õ */
-	{'3', '3',   250},	/* ³ */
-	{'U', '^',   251},	/* Û */
-	{'U', '"',   252},	/* Ü */
-	{'U', '`',   253},	/* Ù */
-	{'U', '\'',  254},	/* Ú */
+       {{'a', '^',    66},	// â
+	{'a', '"',    67},	// ä
+	{'a', '`',    68},	// à
+	{'a', '\'',   69},	// á
+	{'a', '~',    70},	// ã
+	{'a', '@',    71},	// å
+	{'a', 'a',    71},	// å
+	{'c', ',',    72},	// ç
+	{'n', '~',    73},	// ñ
+	{'c', '|',    74},	// ¢
+	{'e', '\'',   81},	// é
+	{'e', '^',    82},	// ê
+	{'e', '"',    83},	// ë
+	{'e', '`',    84},	// è
+	{'i', '\'',   85},	// í
+	{'i', '^',    86},	// î
+	{'i', '"',    87},	// ï
+	{'i', '`',    88},	// ì
+	{'s', 's',    89},	// ß
+	{'A', '^',    98},	// Â
+	{'A', '"',    99},	// Ä
+	{'A', '`',   100},	// À
+	{'A', '\'',  101},	// Á
+	{'A', '~',   102},	// Ã
+	{'A', '@',   103},	// Å
+	{'A', 'A',   103},	// Å
+	{'C', ',',   104},	// Ç
+	{'N', '~',   105},	// Ñ
+	{'|', '|',   106},	// ¦
+	{'o', '/',   112},	// ø
+	{'E', '\'',  113},	// É
+	{'E', '^',   114},	// Ê
+	{'E', '"',   115},	// Ë
+	{'E', '`',   116},	// È
+	{'I', '\'',  117},	// Í
+	{'I', '^',   118},	// Î
+	{'I', '"',   119},	// Ï
+	{'I', '`',   120},	// Ì
+	{'O', '/',   128},	// 0/ XX
+	{'<', '<',   138},	// «
+	{'>', '>',   139},	// »
+	{'d', '-',   140},	// ð
+	{'y', '\'',  141},	// ý
+	{'i', 'p',   142},	// þ
+	{'+', '-',   143},	// ±
+	{'~', 'o',   144},	// °
+	{'a', '-',   154},	// ª
+	{'o', '-',   155},	// º
+	{'a', 'e',   156},	// æ
+	{',', ',',   157},	// , XX
+	{'A', 'E',   158},	// Æ
+	{'o', 'x',   159},	// ¤ - currency symbol in ISO 8859-1
+	{'e', '=',   159},	// ¤ - euro symbol in ISO 8859-15
+	{'E', 'u',   159},	// ¤ - euro symbol in ISO 8859-15
+	{'j', 'u',   160},	// µ
+	{'y', '"',   167},	// x XX
+	{'~', '!',   170},	// ¡
+	{'~', '?',   171},	// ¿
+	{'D', '-',   172},	// Ð
+	{'I', 'p',   174},	// Þ
+	{'r', 'O',   175},	// ®
+	{'-', ',',   176},	// ¬
+	{'$', '$',   177},	// £
+	{'Y', '-',   178},	// ¥
+	{'~', '.',   179},	// ·
+	{'c', 'O',   180},	// ©
+	{'p', 'a',   181},	// §
+	{'p', 'p',   182},	// ¶
+	{'1', '4',   183},	// ¼
+	{'1', '2',   184},	// ½
+	{'3', '4',   185},	// ¾
+	{'Y', '\'',  186},	// Ý
+	{'"', '"',   187},	// ¨
+	{'-', '=',   188},	// ¯
+	{'\'', '\'', 190},	// ´
+	{'O', 'E',   191},	// × - OE in ISO 8859-15
+	{'/', '\\',  191},	// × - multiplication symbol in ISO 8859-1
+	{'-', '-',   202},	// ­
+	{'o', '^',   203},	// ô
+	{'o', '"',   204},	// ö
+	{'o', '`',   205},	// ò
+	{'o', '\'',  206},	// ó
+	{'o', '~',   207},	// õ
+	{'1', '1',   218},	// ¹
+	{'u', '^',   219},	// û
+	{'u', '"',   220},	// ü
+	{'u', '`',   221},	// ù
+	{'u', '\'',  222},	// ú
+	{':', '-',   225},	// ÷ - division symbol in ISO 8859-1
+	{'o', 'e',   225},	// ÷ - oe in ISO 8859-15
+	{'2', '2',   234},	// ²
+	{'O', '^',   235},	// Ô
+	{'O', '"',   236},	// Ö
+	{'O', '`',   237},	// Ò
+	{'O', '\'',  238},	// Ó
+	{'O', '~',   239},	// Õ
+	{'3', '3',   250},	// ³
+	{'U', '^',   251},	// Û
+	{'U', '"',   252},	// Ü
+	{'U', '`',   253},	// Ù
+	{'U', '\'',  254},	// Ú
 	{NUL, NUL, NUL}
 	};
 
@@ -321,116 +321,116 @@
 	/*
 	 * digraphs compatible with Vim 5.x
 	 */
-       {{'~', '!', 161},	/* ¡ */
-	{'c', '|', 162},	/* ¢ */
-	{'$', '$', 163},	/* £ */
-	{'o', 'x', 164},	/* ¤ - currency symbol in ISO 8859-1 */
-	{'e', '=', 164},	/* ¤ - euro symbol in ISO 8859-15 */
-	{'Y', '-', 165},	/* ¥ */
-	{'|', '|', 166},	/* ¦ */
-	{'p', 'a', 167},	/* § */
-	{'"', '"', 168},	/* ¨ */
-	{'c', 'O', 169},	/* © */
-	{'a', '-', 170},	/* ª */
-	{'<', '<', 171},	/* « */
-	{'-', ',', 172},	/* ¬ */
-	{'-', '-', 173},	/* ­ */
-	{'r', 'O', 174},	/* ® */
-	{'-', '=', 175},	/* ¯ */
-	{'~', 'o', 176},	/* ° */
-	{'+', '-', 177},	/* ± */
-	{'2', '2', 178},	/* ² */
-	{'3', '3', 179},	/* ³ */
-	{'\'', '\'', 180},	/* ´ */
-	{'j', 'u', 181},	/* µ */
-	{'p', 'p', 182},	/* ¶ */
-	{'~', '.', 183},	/* · */
-	{',', ',', 184},	/* ¸ */
-	{'1', '1', 185},	/* ¹ */
-	{'o', '-', 186},	/* º */
-	{'>', '>', 187},	/* » */
-	{'1', '4', 188},	/* ¼ */
-	{'1', '2', 189},	/* ½ */
-	{'3', '4', 190},	/* ¾ */
-	{'~', '?', 191},	/* ¿ */
-	{'A', '`', 192},	/* À */
-	{'A', '\'', 193},	/* Á */
-	{'A', '^', 194},	/* Â */
-	{'A', '~', 195},	/* Ã */
-	{'A', '"', 196},	/* Ä */
-	{'A', '@', 197},	/* Å */
-	{'A', 'A', 197},	/* Å */
-	{'A', 'E', 198},	/* Æ */
-	{'C', ',', 199},	/* Ç */
-	{'E', '`', 200},	/* È */
-	{'E', '\'', 201},	/* É */
-	{'E', '^', 202},	/* Ê */
-	{'E', '"', 203},	/* Ë */
-	{'I', '`', 204},	/* Ì */
-	{'I', '\'', 205},	/* Í */
-	{'I', '^', 206},	/* Î */
-	{'I', '"', 207},	/* Ï */
-	{'D', '-', 208},	/* Ð */
-	{'N', '~', 209},	/* Ñ */
-	{'O', '`', 210},	/* Ò */
-	{'O', '\'', 211},	/* Ó */
-	{'O', '^', 212},	/* Ô */
-	{'O', '~', 213},	/* Õ */
-	{'O', '"', 214},	/* Ö */
-	{'/', '\\', 215},	/* × - multiplication symbol in ISO 8859-1 */
-	{'O', 'E', 215},	/* × - OE in ISO 8859-15 */
-	{'O', '/', 216},	/* Ø */
-	{'U', '`', 217},	/* Ù */
-	{'U', '\'', 218},	/* Ú */
-	{'U', '^', 219},	/* Û */
-	{'U', '"', 220},	/* Ü */
-	{'Y', '\'', 221},	/* Ý */
-	{'I', 'p', 222},	/* Þ */
-	{'s', 's', 223},	/* ß */
-	{'a', '`', 224},	/* à */
-	{'a', '\'', 225},	/* á */
-	{'a', '^', 226},	/* â */
-	{'a', '~', 227},	/* ã */
-	{'a', '"', 228},	/* ä */
-	{'a', '@', 229},	/* å */
-	{'a', 'a', 229},	/* å */
-	{'a', 'e', 230},	/* æ */
-	{'c', ',', 231},	/* ç */
-	{'e', '`', 232},	/* è */
-	{'e', '\'', 233},	/* é */
-	{'e', '^', 234},	/* ê */
-	{'e', '"', 235},	/* ë */
-	{'i', '`', 236},	/* ì */
-	{'i', '\'', 237},	/* í */
-	{'i', '^', 238},	/* î */
-	{'i', '"', 239},	/* ï */
-	{'d', '-', 240},	/* ð */
-	{'n', '~', 241},	/* ñ */
-	{'o', '`', 242},	/* ò */
-	{'o', '\'', 243},	/* ó */
-	{'o', '^', 244},	/* ô */
-	{'o', '~', 245},	/* õ */
-	{'o', '"', 246},	/* ö */
-	{':', '-', 247},	/* ÷ - division symbol in ISO 8859-1 */
-	{'o', 'e', 247},	/* ÷ - oe in ISO 8859-15 */
-	{'o', '/', 248},	/* ø */
-	{'u', '`', 249},	/* ù */
-	{'u', '\'', 250},	/* ú */
-	{'u', '^', 251},	/* û */
-	{'u', '"', 252},	/* ü */
-	{'y', '\'', 253},	/* ý */
-	{'i', 'p', 254},	/* þ */
-	{'y', '"', 255},	/* x XX */
+       {{'~', '!', 161},	// ¡
+	{'c', '|', 162},	// ¢
+	{'$', '$', 163},	// £
+	{'o', 'x', 164},	// ¤ - currency symbol in ISO 8859-1
+	{'e', '=', 164},	// ¤ - euro symbol in ISO 8859-15
+	{'Y', '-', 165},	// ¥
+	{'|', '|', 166},	// ¦
+	{'p', 'a', 167},	// §
+	{'"', '"', 168},	// ¨
+	{'c', 'O', 169},	// ©
+	{'a', '-', 170},	// ª
+	{'<', '<', 171},	// «
+	{'-', ',', 172},	// ¬
+	{'-', '-', 173},	// ­
+	{'r', 'O', 174},	// ®
+	{'-', '=', 175},	// ¯
+	{'~', 'o', 176},	// °
+	{'+', '-', 177},	// ±
+	{'2', '2', 178},	// ²
+	{'3', '3', 179},	// ³
+	{'\'', '\'', 180},	// ´
+	{'j', 'u', 181},	// µ
+	{'p', 'p', 182},	// ¶
+	{'~', '.', 183},	// ·
+	{',', ',', 184},	// ¸
+	{'1', '1', 185},	// ¹
+	{'o', '-', 186},	// º
+	{'>', '>', 187},	// »
+	{'1', '4', 188},	// ¼
+	{'1', '2', 189},	// ½
+	{'3', '4', 190},	// ¾
+	{'~', '?', 191},	// ¿
+	{'A', '`', 192},	// À
+	{'A', '\'', 193},	// Á
+	{'A', '^', 194},	// Â
+	{'A', '~', 195},	// Ã
+	{'A', '"', 196},	// Ä
+	{'A', '@', 197},	// Å
+	{'A', 'A', 197},	// Å
+	{'A', 'E', 198},	// Æ
+	{'C', ',', 199},	// Ç
+	{'E', '`', 200},	// È
+	{'E', '\'', 201},	// É
+	{'E', '^', 202},	// Ê
+	{'E', '"', 203},	// Ë
+	{'I', '`', 204},	// Ì
+	{'I', '\'', 205},	// Í
+	{'I', '^', 206},	// Î
+	{'I', '"', 207},	// Ï
+	{'D', '-', 208},	// Ð
+	{'N', '~', 209},	// Ñ
+	{'O', '`', 210},	// Ò
+	{'O', '\'', 211},	// Ó
+	{'O', '^', 212},	// Ô
+	{'O', '~', 213},	// Õ
+	{'O', '"', 214},	// Ö
+	{'/', '\\', 215},	// × - multiplication symbol in ISO 8859-1
+	{'O', 'E', 215},	// × - OE in ISO 8859-15
+	{'O', '/', 216},	// Ø
+	{'U', '`', 217},	// Ù
+	{'U', '\'', 218},	// Ú
+	{'U', '^', 219},	// Û
+	{'U', '"', 220},	// Ü
+	{'Y', '\'', 221},	// Ý
+	{'I', 'p', 222},	// Þ
+	{'s', 's', 223},	// ß
+	{'a', '`', 224},	// à
+	{'a', '\'', 225},	// á
+	{'a', '^', 226},	// â
+	{'a', '~', 227},	// ã
+	{'a', '"', 228},	// ä
+	{'a', '@', 229},	// å
+	{'a', 'a', 229},	// å
+	{'a', 'e', 230},	// æ
+	{'c', ',', 231},	// ç
+	{'e', '`', 232},	// è
+	{'e', '\'', 233},	// é
+	{'e', '^', 234},	// ê
+	{'e', '"', 235},	// ë
+	{'i', '`', 236},	// ì
+	{'i', '\'', 237},	// í
+	{'i', '^', 238},	// î
+	{'i', '"', 239},	// ï
+	{'d', '-', 240},	// ð
+	{'n', '~', 241},	// ñ
+	{'o', '`', 242},	// ò
+	{'o', '\'', 243},	// ó
+	{'o', '^', 244},	// ô
+	{'o', '~', 245},	// õ
+	{'o', '"', 246},	// ö
+	{':', '-', 247},	// ÷ - division symbol in ISO 8859-1
+	{'o', 'e', 247},	// ÷ - oe in ISO 8859-15
+	{'o', '/', 248},	// ø
+	{'u', '`', 249},	// ù
+	{'u', '\'', 250},	// ú
+	{'u', '^', 251},	// û
+	{'u', '"', 252},	// ü
+	{'y', '\'', 253},	// ý
+	{'i', 'p', 254},	// þ
+	{'y', '"', 255},	// x XX
 	{NUL, NUL, NUL}
 	};
-#   else /* OLD_DIGRAPHS */
+#   else // OLD_DIGRAPHS
 
 	/*
 	 * digraphs for Unicode from RFC1345
 	 * (also work for ISO-8859-1 aka latin1)
 	 */
        {
-	{'N', 'U', 0x0a},	/* LF for NUL */
+	{'N', 'U', 0x0a},	// LF for NUL
 	{'S', 'H', 0x01},
 	{'S', 'X', 0x02},
 	{'E', 'X', 0x03},
@@ -1287,10 +1287,10 @@
 	{'L', 'i', 0x20a4},
 	{'P', 't', 0x20a7},
 	{'W', '=', 0x20a9},
-	{'=', 'e', 0x20ac}, /* euro */
-	{'E', 'u', 0x20ac}, /* euro */
-	{'=', 'R', 0x20bd}, /* rouble */
-	{'=', 'P', 0x20bd}, /* rouble */
+	{'=', 'e', 0x20ac}, // euro
+	{'E', 'u', 0x20ac}, // euro
+	{'=', 'R', 0x20bd}, // rouble
+	{'=', 'P', 0x20bd}, // rouble
 #define DG_START_OTHER1 0x2103
 	{'o', 'C', 0x2103},
 	{'c', 'o', 0x2105},
@@ -1815,8 +1815,8 @@
 	{'7', 'c', 0x3226},
 	{'8', 'c', 0x3227},
 	{'9', 'c', 0x3228},
-	/* code points 0xe000 - 0xefff excluded, they have no assigned
-	 * characters, only used in proposals. */
+	// code points 0xe000 - 0xefff excluded, they have no assigned
+	// characters, only used in proposals.
 	{'f', 'f', 0xfb00},
 	{'f', 'i', 0xfb01},
 	{'f', 'l', 0xfb02},
@@ -1826,10 +1826,10 @@
 	{NUL, NUL, NUL}
        };
 
-#   endif /* OLD_DIGRAPHS */
-#  endif /* EBCDIC */
-# endif    /* !HPUX_DIGRAPHS */
-#endif	/* !__MINT__ */
+#   endif // OLD_DIGRAPHS
+#  endif // EBCDIC
+# endif // !HPUX_DIGRAPHS
+#endif // !__MINT__
 
 /*
  * handle digraphs after typing a character
@@ -1837,10 +1837,10 @@
     int
 do_digraph(int c)
 {
-    static int	backspaced;	/* character before K_BS */
-    static int	lastchar;	/* last typed character */
+    static int	backspaced;	// character before K_BS
+    static int	lastchar;	// last typed character
 
-    if (c == -1)		/* init values */
+    if (c == -1)		// init values
     {
 	backspaced = -1;
     }
@@ -1921,7 +1921,7 @@
  */
     int
 get_digraph(
-    int		cmdline)	/* TRUE when called from the cmdline */
+    int		cmdline)	// TRUE when called from the cmdline
 {
     int		c, cc;
 
@@ -1930,9 +1930,9 @@
     c = plain_vgetc();
     --no_mapping;
     --allow_keys;
-    if (c != ESC)		/* ESC cancels CTRL-K */
+    if (c != ESC)		// ESC cancels CTRL-K
     {
-	if (IS_SPECIAL(c))	/* insert special key code */
+	if (IS_SPECIAL(c))	// insert special key code
 	    return c;
 	if (cmdline)
 	{
@@ -1952,7 +1952,7 @@
 	cc = plain_vgetc();
 	--no_mapping;
 	--allow_keys;
-	if (cc != ESC)	    /* ESC cancels CTRL-K */
+	if (cc != ESC)	    // ESC cancels CTRL-K
 	    return getdigraph(c, cc, TRUE);
     }
     return NUL;
@@ -2029,13 +2029,13 @@
     }
 #endif
 
-    /* Ignore multi-byte characters when not in multi-byte mode. */
+    // Ignore multi-byte characters when not in multi-byte mode.
     if (!has_mbyte && retval > 0xff)
 	retval = 0;
 
-    if (retval == 0)		/* digraph deleted or not found */
+    if (retval == 0)		// digraph deleted or not found
     {
-	if (char1 == ' ' && meta_char)	/* <space> <char> --> meta-char */
+	if (char1 == ' ' && meta_char)	// <space> <char> --> meta-char
 	    return (char2 | 0x80);
 	return char2;
     }
@@ -2094,7 +2094,7 @@
 	}
 	n = getdigits(&str);
 
-	/* If the digraph already exists, replace the result. */
+	// If the digraph already exists, replace the result.
 	dp = (digr_T *)user_digraphs.ga_data;
 	for (i = 0; i < user_digraphs.ga_len; ++i)
 	{
@@ -2106,7 +2106,7 @@
 	    ++dp;
 	}
 
-	/* Add a new digraph to the table. */
+	// Add a new digraph to the table.
 	if (i == user_digraphs.ga_len)
 	{
 	    if (ga_grow(&user_digraphs, 1) == OK)
@@ -2147,7 +2147,7 @@
 #if defined(USE_UNICODE_DIGRAPHS)
 	digr_T tmp;
 
-	/* May need to convert the result to 'encoding'. */
+	// May need to convert the result to 'encoding'.
 	tmp.char1 = dp->char1;
 	tmp.char2 = dp->char2;
 	tmp.result = getexactdigraph(tmp.char1, tmp.char2, FALSE);
@@ -2176,8 +2176,8 @@
 	ui_breakcheck();
 	++dp;
     }
-    must_redraw = CLEAR;    /* clear screen, because some digraphs may be
-			       wrong, in which case we messed up ScreenLines */
+    must_redraw = CLEAR;    // clear screen, because some digraphs may be
+			    // wrong, in which case we messed up ScreenLines
 }
 
 static struct dg_header_entry {
@@ -2259,7 +2259,7 @@
 	p = buf;
 	if (has_mbyte)
 	{
-	    /* add a space to draw a composing char on */
+	    // add a space to draw a composing char on
 	    if (enc_utf8 && utf_iscomposing(dp->result))
 		*p++ = ' ';
 	    p += (*mb_char2bytes)(dp->result, p);
@@ -2276,18 +2276,18 @@
     }
 }
 
-#endif /* FEAT_DIGRAPHS */
+#endif // FEAT_DIGRAPHS
 
 #if defined(FEAT_KEYMAP) || defined(PROTO)
 
-/* structure used for b_kmap_ga.ga_data */
+// structure used for b_kmap_ga.ga_data
 typedef struct
 {
     char_u	*from;
     char_u	*to;
 } kmap_T;
 
-#define KMAP_MAXLEN 20	    /* maximum length of "from" or "to" */
+#define KMAP_MAXLEN 20	    // maximum length of "from" or "to"
 
 static void keymap_unload(void);
 
@@ -2304,8 +2304,8 @@
 
     if (*curbuf->b_p_keymap == NUL)
     {
-	/* Stop any active keymap and clear the table.  Also remove
-	 * b:keymap_name, as no keymap is active now. */
+	// Stop any active keymap and clear the table.  Also remove
+	// b:keymap_name, as no keymap is active now.
 	keymap_unload();
 	do_cmdline_cmd((char_u *)"unlet! b:keymap_name");
     }
@@ -2314,19 +2314,19 @@
 	char_u	*buf;
 	size_t  buflen;
 
-	/* Source the keymap file.  It will contain a ":loadkeymap" command
-	 * which will call ex_loadkeymap() below. */
+	// Source the keymap file.  It will contain a ":loadkeymap" command
+	// which will call ex_loadkeymap() below.
 	buflen = STRLEN(curbuf->b_p_keymap) + STRLEN(p_enc) + 14;
 	buf = alloc(buflen);
 	if (buf == NULL)
 	    return e_outofmem;
 
-	/* try finding "keymap/'keymap'_'encoding'.vim"  in 'runtimepath' */
+	// try finding "keymap/'keymap'_'encoding'.vim"  in 'runtimepath'
 	vim_snprintf((char *)buf, buflen, "keymap/%s_%s.vim",
 						   curbuf->b_p_keymap, p_enc);
 	if (source_runtime(buf, 0) == FAIL)
 	{
-	    /* try finding "keymap/'keymap'.vim" in 'runtimepath'  */
+	    // try finding "keymap/'keymap'.vim" in 'runtimepath'
 	    vim_snprintf((char *)buf, buflen, "keymap/%s.vim",
 							  curbuf->b_p_keymap);
 	    if (source_runtime(buf, 0) == FAIL)
@@ -2351,7 +2351,7 @@
     char_u	*p;
     char_u	*s;
     kmap_T	*kp;
-#define KMAP_LLEN   200	    /* max length of "to" and "from" together */
+#define KMAP_LLEN   200	    // max length of "to" and "from" together
     char_u	buf[KMAP_LLEN + 11];
     int		i;
     char_u	*save_cpo = p_cpo;
@@ -2370,7 +2370,7 @@
     curbuf->b_kmap_state = 0;
     ga_init2(&curbuf->b_kmap_ga, (int)sizeof(kmap_T), 20);
 
-    /* Set 'cpoptions' to "C" to avoid line continuation. */
+    // Set 'cpoptions' to "C" to avoid line continuation.
     p_cpo = (char_u *)"C";
 
     /*
@@ -2438,10 +2438,10 @@
     if (!(curbuf->b_kmap_state & KEYMAP_LOADED))
 	return;
 
-    /* Set 'cpoptions' to "C" to avoid line continuation. */
+    // Set 'cpoptions' to "C" to avoid line continuation.
     p_cpo = (char_u *)"C";
 
-    /* clear the ":lmap"s */
+    // clear the ":lmap"s
     kp = (kmap_T *)curbuf->b_kmap_ga.ga_data;
     for (i = 0; i < curbuf->b_kmap_ga.ga_len; ++i)
     {
@@ -2469,4 +2469,4 @@
 	vim_free(kp[i].to);
     }
 }
-#endif /* FEAT_KEYMAP */
+#endif // FEAT_KEYMAP
diff --git a/src/dosinst.c b/src/dosinst.c
index 2ff0842..2ded88e 100644
--- a/src/dosinst.c
+++ b/src/dosinst.c
@@ -23,7 +23,7 @@
 #define GVIMEXT64_PATH	    "GvimExt64\\gvimext.dll"
 #define GVIMEXT32_PATH	    "GvimExt32\\gvimext.dll"
 
-/* Macro to do an error check I was typing over and over */
+// Macro to do an error check I was typing over and over
 #define CHECK_REG_ERROR(code) \
     do { \
 	if (code != ERROR_SUCCESS) \
@@ -33,31 +33,31 @@
 	} \
     } while (0)
 
-int	has_vim = 0;		/* installable vim.exe exists */
-int	has_gvim = 0;		/* installable gvim.exe exists */
+int	has_vim = 0;		// installable vim.exe exists
+int	has_gvim = 0;		// installable gvim.exe exists
 
-char	oldvimrc[BUFSIZE];	/* name of existing vimrc file */
-char	vimrc[BUFSIZE];		/* name of vimrc file to create */
+char	oldvimrc[BUFSIZE];	// name of existing vimrc file
+char	vimrc[BUFSIZE];		// name of vimrc file to create
 
-char	*default_bat_dir = NULL;  /* when not NULL, use this as the default
-				     directory to write .bat files in */
-char	*default_vim_dir = NULL;  /* when not NULL, use this as the default
-				     install dir for NSIS */
+char	*default_bat_dir = NULL;  // when not NULL, use this as the default
+				  // directory to write .bat files in
+char	*default_vim_dir = NULL;  // when not NULL, use this as the default
+				  // install dir for NSIS
 
 /*
  * Structure used for each choice the user can make.
  */
 struct choice
 {
-    int	    active;			/* non-zero when choice is active */
-    char    *text;			/* text displayed for this choice */
-    void    (*changefunc)(int idx);	/* function to change this choice */
-    int	    arg;			/* argument for function */
-    void    (*installfunc)(int idx);	/* function to install this choice */
+    int	    active;			// non-zero when choice is active
+    char    *text;			// text displayed for this choice
+    void    (*changefunc)(int idx);	// function to change this choice
+    int	    arg;			// argument for function
+    void    (*installfunc)(int idx);	// function to install this choice
 };
 
-struct choice	choices[30];		/* choices the user can make */
-int		choice_count = 0;	/* number of choices available */
+struct choice	choices[30];		// choices the user can make
+int		choice_count = 0;	// number of choices available
 
 #define TABLE_SIZE(s)	(int)(sizeof(s) / sizeof(*s))
 
@@ -123,13 +123,13 @@
     "In your HOME directory",
 };
 
-/* non-zero when selected to install the popup menu entry. */
+// non-zero when selected to install the popup menu entry.
 static int	install_popup = 0;
 
-/* non-zero when selected to install the "Open with" entry. */
+// non-zero when selected to install the "Open with" entry.
 static int	install_openwith = 0;
 
-/* non-zero when need to add an uninstall entry in the registry */
+// non-zero when need to add an uninstall entry in the registry
 static int	need_uninstall_entry = 0;
 
 /*
@@ -191,7 +191,7 @@
     FILE	*fd;
     struct stat	st;
 
-    /* check for presence of the correct version number in installdir[] */
+    // check for presence of the correct version number in installdir[]
     runtimeidx = strlen(installdir) - strlen(VIM_VERSION_NODOT);
     if (runtimeidx <= 0
 	    || stricmp(installdir + runtimeidx, VIM_VERSION_NODOT) != 0
@@ -204,8 +204,8 @@
 	myexit(1);
     }
 
-    /* check if filetype.vim is present, which means the runtime archive has
-     * been unpacked  */
+    // check if filetype.vim is present, which means the runtime archive has
+    // been unpacked
     sprintf(buf, "%s\\filetype.vim", installdir);
     if (stat(buf, &st) < 0)
     {
@@ -216,7 +216,7 @@
 	myexit(1);
     }
 
-    /* Check if vim.exe or gvim.exe is in the current directory. */
+    // Check if vim.exe or gvim.exe is in the current directory.
     if ((fd = fopen("gvim.exe", "r")) != NULL)
     {
 	fclose(fd);
@@ -251,32 +251,32 @@
 	qlen = strlen(q);
     for (i = 0; ; ++i)
     {
-	/* End of "p": check if "q" also ends or just has a slash. */
+	// End of "p": check if "q" also ends or just has a slash.
 	if (i == plen)
 	{
-	    if (i == qlen)  /* match */
+	    if (i == qlen)  // match
 		return 0;
 	    if (i == qlen - 1 && (q[i] == '\\' || q[i] == '/'))
-		return 0;   /* match with trailing slash */
-	    return 1;	    /* no match */
+		return 0;   // match with trailing slash
+	    return 1;	    // no match
 	}
 
-	/* End of "q": check if "p" also ends or just has a slash. */
+	// End of "q": check if "p" also ends or just has a slash.
 	if (i == qlen)
 	{
-	    if (i == plen)  /* match */
+	    if (i == plen)  // match
 		return 0;
 	    if (i == plen - 1 && (p[i] == '\\' || p[i] == '/'))
-		return 0;   /* match with trailing slash */
-	    return 1;	    /* no match */
+		return 0;   // match with trailing slash
+	    return 1;	    // no match
 	}
 
 	if (!(mytoupper(p[i]) == mytoupper(q[i])
 		|| ((p[i] == '/' || p[i] == '\\')
 		    && (q[i] == '/' || q[i] == '\\'))))
-	    return 1;	    /* no match */
+	    return 1;	    // no match
     }
-    /*NOTREACHED*/
+    //NOTREACHED
 }
 
 /*
@@ -308,7 +308,7 @@
 
     tmpname = alloc(strlen(cp) + 1);
     strcpy(tmpname, cp);
-    tmpname[strlen(tmpname) - 1] = 'x';	/* .exe -> .exx */
+    tmpname[strlen(tmpname) - 1] = 'x';	// .exe -> .exx
 
     if (access(tmpname, 0) == 0)
     {
@@ -347,7 +347,7 @@
 {
     int		i;
 
-    /* avoid looking in the "installdir" by chdir to system root */
+    // avoid looking in the "installdir" by chdir to system root
     mch_chdir(sysdrive);
     mch_chdir("\\");
 
@@ -386,7 +386,7 @@
     FILE	*fd;
     char	fname[BUFSIZE];
 
-    /* First get $VIMRUNTIME.  If it's set, remove the tail. */
+    // First get $VIMRUNTIME.  If it's set, remove the tail.
     vim = getenv("VIMRUNTIME");
     if (vim != NULL && *vim != 0 && strlen(vim) < sizeof(buf))
     {
@@ -399,18 +399,18 @@
 	vim = getenv("VIM");
 	if (vim == NULL || *vim == 0)
 	{
-	    /* Use the directory from an old uninstall entry. */
+	    // Use the directory from an old uninstall entry.
 	    if (default_vim_dir != NULL)
 		vim = default_vim_dir;
 	    else
-		/* Let NSIS know there is no default, it should use
-		 * $PROGRAMFILES. */
+		// Let NSIS know there is no default, it should use
+		// $PROGRAMFILES.
 		vim = "";
 	}
     }
 
-    /* NSIS also uses GetTempPath(), thus we should get the same directory
-     * name as where NSIS will look for vimini.ini. */
+    // NSIS also uses GetTempPath(), thus we should get the same directory
+    // name as where NSIS will look for vimini.ini.
     GetTempPath(sizeof(fname) - 12, fname);
     add_pathsep(fname);
     strcat(fname, "vimini.ini");
@@ -418,8 +418,8 @@
     fd = fopen(fname, "w");
     if (fd != NULL)
     {
-	/* Make it look like an .ini file, so that NSIS can read it with a
-	 * ReadINIStr command. */
+	// Make it look like an .ini file, so that NSIS can read it with a
+	// ReadINIStr command.
 	fprintf(fd, "[vimini]\n");
 	fprintf(fd, "dir=\"%s\"\n", vim);
 	fclose(fd);
@@ -437,7 +437,7 @@
  * Callback used for EnumWindows():
  * Count the window if the title looks like it is for the uninstaller.
  */
-/*ARGSUSED*/
+//ARGSUSED
     static BOOL CALLBACK
 window_cb(HWND hwnd, LPARAM lparam)
 {
@@ -469,7 +469,7 @@
     if (!GetTempPath(sizeof(temp_dir), temp_dir))
 	return FAIL;
 
-    /* Copy the uninstaller to a temporary exe. */
+    // Copy the uninstaller to a temporary exe.
     tick = GetTickCount();
     for (i = 0; ; i++)
     {
@@ -483,7 +483,7 @@
 	    return FAIL;
     }
 
-    /* Run the copied uninstaller silently. */
+    // Run the copied uninstaller silently.
     if (strchr(temp_uninst, ' ') != NULL)
 	sprintf(buf, "\"%s\" /S _?=%s", temp_uninst, vimrt_dir);
     else
@@ -531,12 +531,12 @@
 
 	if (strncmp("Vim", subkey_name_buff, 3) == 0)
 	{
-	    /* Open the key named Vim* */
+	    // Open the key named Vim*
 	    code = RegOpenKeyEx(key_handle, subkey_name_buff, 0,
 			   KEY_WOW64_64KEY | KEY_READ, &uninstall_key_handle);
 	    CHECK_REG_ERROR(code);
 
-	    /* get the DisplayName out of it to show the user */
+	    // get the DisplayName out of it to show the user
 	    local_bufsize = sizeof(temp_string_buffer);
 	    code = RegQueryValueEx(uninstall_key_handle, "displayname", 0,
 		    &value_type, (LPBYTE)temp_string_buffer,
@@ -569,13 +569,13 @@
 		printf("\nDo you want to uninstall \"%s\" now?\n(y)es/(n)o)  ", temp_string_buffer);
 	    fflush(stdout);
 
-	    /* get the UninstallString */
+	    // get the UninstallString
 	    local_bufsize = sizeof(temp_string_buffer);
 	    code = RegQueryValueEx(uninstall_key_handle, "uninstallstring", 0,
 		    &value_type, (LPBYTE)temp_string_buffer, &local_bufsize);
 	    CHECK_REG_ERROR(code);
 
-	    /* Remember the directory, it is used as the default for NSIS. */
+	    // Remember the directory, it is used as the default for NSIS.
 	    default_vim_dir = alloc(strlen(temp_string_buffer) + 1);
 	    strcpy(default_vim_dir, temp_string_buffer);
 	    remove_tail(default_vim_dir);
@@ -598,25 +598,25 @@
 		{
 		    case 'y':
 		    case 'Y':
-			/* save the number of uninstall keys so we can know if
-			 * it changed */
+			// save the number of uninstall keys so we can know if
+			// it changed
 			RegQueryInfoKey(key_handle, NULL, NULL, NULL,
 					     &orig_num_keys, NULL, NULL, NULL,
 						      NULL, NULL, NULL, NULL);
 
-			/* Find existing .bat files before deleting them. */
+			// Find existing .bat files before deleting them.
 			find_bat_exe(TRUE);
 
 			if (allow_silent)
 			{
 			    if (run_silent_uninstall(temp_string_buffer)
 								    == FAIL)
-				allow_silent = 0; /* Retry with non silent. */
+				allow_silent = 0; // Retry with non silent.
 			}
 			if (!allow_silent)
 			{
-			    /* Execute the uninstall program.  Put it in double
-			     * quotes if there is an embedded space. */
+			    // Execute the uninstall program.  Put it in double
+			    // quotes if there is an embedded space.
 			    {
 				char buf[BUFSIZE];
 
@@ -627,18 +627,18 @@
 				run_command(buf);
 			    }
 
-			    /* Count the number of windows with a title that match
-			     * the installer, so that we can check when it's done.
-			     * The uninstaller copies itself, executes the copy
-			     * and exits, thus we can't wait for the process to
-			     * finish. */
-			    sleep(1);  /* wait for uninstaller to start up */
+			    // Count the number of windows with a title that
+			    // match the installer, so that we can check when
+			    // it's done.  The uninstaller copies itself,
+			    // executes the copy and exits, thus we can't wait
+			    // for the process to finish.
+			    sleep(1);  // wait for uninstaller to start up
 			    num_windows = 0;
 			    EnumWindows(window_cb, 0);
 			    if (num_windows == 0)
 			    {
-				/* Did not find the uninstaller, ask user to press
-				 * Enter when done. Just in case. */
+				// Did not find the uninstaller, ask user to
+				// press Enter when done. Just in case.
 				printf("Press Enter when the uninstaller is finished\n");
 				rewind(stdin);
 				(void)getchar();
@@ -650,7 +650,8 @@
 				{
 				    printf(".");
 				    fflush(stdout);
-				    sleep(1);  /* wait for the uninstaller to finish */
+				    sleep(1);	// wait for the uninstaller to
+						// finish
 				    num_windows = 0;
 				    EnumWindows(window_cb, 0);
 				} while (num_windows > 0);
@@ -658,10 +659,10 @@
 			}
 			printf("\nDone!\n");
 
-			/* Check if an uninstall reg key was deleted.
-			 * if it was, we want to decrement key_index.
-			 * if we don't do this, we will skip the key
-			 * immediately after any key that we delete.  */
+			// Check if an uninstall reg key was deleted.
+			// if it was, we want to decrement key_index.
+			// if we don't do this, we will skip the key
+			// immediately after any key that we delete.
 			RegQueryInfoKey(key_handle, NULL, NULL, NULL,
 					      &new_num_keys, NULL, NULL, NULL,
 						      NULL, NULL, NULL, NULL);
@@ -673,11 +674,11 @@
 
 		    case 'n':
 		    case 'N':
-			/* Do not uninstall */
+			// Do not uninstall
 			input = 'n';
 			break;
 
-		    default: /* just drop through and redo the loop */
+		    default: // just drop through and redo the loop
 			break;
 		}
 
@@ -705,7 +706,7 @@
     int		i;
     int		foundone;
 
-    /* This may take a little while, let the user know what we're doing. */
+    // This may take a little while, let the user know what we're doing.
     printf("Inspecting system...\n");
 
     /*
@@ -785,7 +786,7 @@
     strcpy(oldvimrc + runtimeidx, "_vimrc");
     if ((fd = fopen(oldvimrc, "r")) == NULL)
     {
-	strcpy(oldvimrc + runtimeidx, "vimrc~1"); /* short version of .vimrc */
+	strcpy(oldvimrc + runtimeidx, "vimrc~1"); // short version of .vimrc
 	if ((fd = fopen(oldvimrc, "r")) == NULL)
 	{
 	    strcpy(oldvimrc + runtimeidx, ".vimrc");
@@ -814,9 +815,8 @@
     ++choice_count;
 }
 
-/***********************************************
- * stuff for creating the batch files.
- */
+////////////////////////////////////////////////
+// stuff for creating the batch files.
 
 /*
  * Install the vim.bat, gvim.bat, etc. files.
@@ -844,7 +844,8 @@
 	    fprintf(fd, "\n");
 	    fprintf(fd, "setlocal\n");
 
-	    /* Don't use double quotes for the "set" argument, also when it
+	    /*
+	     * Don't use double quotes for the "set" argument, also when it
 	     * contains a space.  The quotes would be included in the value
 	     * for MSDOS and NT.
 	     * The order of preference is:
@@ -858,7 +859,7 @@
 	    fprintf(fd, "if exist \"%%VIMRUNTIME%%\\%s\" set VIM_EXE_DIR=%%VIMRUNTIME%%\n", exename);
 	    fprintf(fd, "\n");
 
-	    /* Give an error message when the executable could not be found. */
+	    // Give an error message when the executable could not be found.
 	    fprintf(fd, "if exist \"%%VIM_EXE_DIR%%\\%s\" goto havevim\n",
 								     exename);
 	    fprintf(fd, "echo \"%%VIM_EXE_DIR%%\\%s\" not found\n", exename);
@@ -890,15 +891,15 @@
 	    fprintf(fd, "if .%%OS%%==.Windows_NT goto ntaction\n");
 	    fprintf(fd, "\n");
 
-	    /* For gvim.exe use "start" to avoid that the console window stays
-	     * open. */
+	    // For gvim.exe use "start" to avoid that the console window stays
+	    // open.
 	    if (*exename == 'g')
 	    {
 		fprintf(fd, "if .%%VIMNOFORK%%==.1 goto nofork\n");
 		fprintf(fd, "start ");
 	    }
 
-	    /* Always use quotes, $VIM or $VIMRUNTIME might have a space. */
+	    // Always use quotes, $VIM or $VIMRUNTIME might have a space.
 	    fprintf(fd, "\"%%VIM_EXE_DIR%%\\%s\" %s %%VIMARGS%%\n",
 							     exename, vimarg);
 	    fprintf(fd, "goto eof\n");
@@ -908,7 +909,7 @@
 	    {
 		fprintf(fd, ":nofork\n");
 		fprintf(fd, "start /w ");
-		/* Always use quotes, $VIM or $VIMRUNTIME might have a space. */
+		// Always use quotes, $VIM or $VIMRUNTIME might have a space.
 		fprintf(fd, "\"%%VIM_EXE_DIR%%\\%s\" %s %%VIMARGS%%\n",
 							     exename, vimarg);
 		fprintf(fd, "goto eof\n");
@@ -918,15 +919,15 @@
 	    fprintf(fd, ":ntaction\n");
 	    fprintf(fd, "rem for WinNT we can use %%*\n");
 
-	    /* For gvim.exe use "start /b" to avoid that the console window
-	     * stays open. */
+	    // For gvim.exe use "start /b" to avoid that the console window
+	    // stays open.
 	    if (*exename == 'g')
 	    {
 		fprintf(fd, "if .%%VIMNOFORK%%==.1 goto noforknt\n");
 		fprintf(fd, "start \"dummy\" /b ");
 	    }
 
-	    /* Always use quotes, $VIM or $VIMRUNTIME might have a space. */
+	    // Always use quotes, $VIM or $VIMRUNTIME might have a space.
 	    fprintf(fd, "\"%%VIM_EXE_DIR%%\\%s\" %s %%*\n", exename, vimarg);
 	    fprintf(fd, "goto eof\n");
 	    fprintf(fd, "\n");
@@ -935,7 +936,7 @@
 	    {
 		fprintf(fd, ":noforknt\n");
 		fprintf(fd, "start \"dummy\" /b /wait ");
-		/* Always use quotes, $VIM or $VIMRUNTIME might have a space. */
+		// Always use quotes, $VIM or $VIMRUNTIME might have a space.
 		fprintf(fd, "\"%%VIM_EXE_DIR%%\\%s\" %s %%*\n",
 							     exename, vimarg);
 	    }
@@ -1064,15 +1065,15 @@
 
     if (n == count)
     {
-	/* Selected last item, don't create bat file. */
+	// Selected last item, don't create bat file.
 	*batpath = NUL;
 	if (choices[idx].arg != 0)
 	    alloc_text(idx, "    Do NOT create %s", name);
     }
     else
     {
-	/* Selected one of the paths.  For the first item only keep the path,
-	 * for the others append the batch file name. */
+	// Selected one of the paths.  For the first item only keep the path,
+	// for the others append the batch file name.
 	strcpy(batpath, names[n]);
 	add_pathsep(batpath);
 	if (choices[idx].arg != 0)
@@ -1092,7 +1093,7 @@
 {
     int		i;
 
-    /* let the user select a default directory or NONE */
+    // let the user select a default directory or NONE
     change_bat_choice(idx);
 
     if (targets[0].batpath[0] != NUL)
@@ -1100,11 +1101,11 @@
     else
 	choices[idx].text = bat_text_no;
 
-    /* update the individual batch file selections */
+    // update the individual batch file selections
     for (i = 1; i < TARGET_COUNT; ++i)
     {
-	/* Only make it active when the first item has a path and the vim.exe
-	 * or gvim.exe exists (there is a changefunc then). */
+	// Only make it active when the first item has a path and the vim.exe
+	// or gvim.exe exists (there is a changefunc then).
 	if (targets[0].batpath[0] != NUL
 		&& choices[idx + i].changefunc != NULL)
 	{
@@ -1135,10 +1136,10 @@
     choices[choice_count].arg = target;
     choices[choice_count].installfunc = install_bat_choice;
     choices[choice_count].active = 1;
-    choices[choice_count].text = NULL;	/* will be set below */
+    choices[choice_count].text = NULL;	// will be set below
     if (oldbat != NULL)
     {
-	/* A [g]vim.bat exists: Only choice is to overwrite it or not. */
+	// A [g]vim.bat exists: Only choice is to overwrite it or not.
 	choices[choice_count].changefunc = toggle_bat_choice;
 	*batpath = NUL;
 	toggle_bat_choice(choice_count);
@@ -1146,19 +1147,19 @@
     else
     {
 	if (default_bat_dir != NULL)
-	    /* Prefer using the same path as an existing .bat file. */
+	    // Prefer using the same path as an existing .bat file.
 	    strcpy(batpath, default_bat_dir);
 	else
 	{
-	    /* No [g]vim.bat exists: Write it to a directory in $PATH.  Use
-	     * $WINDIR by default, if it's empty the first item in $PATH. */
+	    // No [g]vim.bat exists: Write it to a directory in $PATH.  Use
+	    // $WINDIR by default, if it's empty the first item in $PATH.
 	    p = getenv("WINDIR");
 	    if (p != NULL && *p != NUL)
 		strcpy(batpath, p);
 	    else
 	    {
 		p = getenv("PATH");
-		if (p == NULL || *p == NUL)		/* "cannot happen" */
+		if (p == NULL || *p == NUL)		// "cannot happen"
 		    strcpy(batpath, "C:/Windows");
 		else
 		{
@@ -1186,8 +1187,8 @@
 {
     int		i;
 
-    /* The first item is used to switch installing batch files on/off and
-     * setting the default path. */
+    // The first item is used to switch installing batch files on/off and
+    // setting the default path.
     choices[choice_count].text = bat_text_yes;
     choices[choice_count].changefunc = change_main_bat_choice;
     choices[choice_count].installfunc = NULL;
@@ -1195,8 +1196,8 @@
     choices[choice_count].arg = 0;
     ++choice_count;
 
-    /* Add items for each batch file target.  Only used when not disabled by
-     * the first item.  When a .exe exists, don't offer to create a .bat. */
+    // Add items for each batch file target.  Only used when not disabled by
+    // the first item.  When a .exe exists, don't offer to create a .bat.
     for (i = 1; i < TARGET_COUNT; ++i)
 	if (targets[i].oldexe == NULL
 		&& (targets[i].exenamearg[0] == 'g' ? has_gvim : has_vim))
@@ -1214,8 +1215,8 @@
     FILE	*fd, *tfd;
     char	*fname;
 
-    /* If an old vimrc file exists, overwrite it.
-     * Otherwise create a new one. */
+    // If an old vimrc file exists, overwrite it.
+    // Otherwise create a new one.
     if (*oldvimrc != NUL)
 	fname = oldvimrc;
     else
@@ -1275,7 +1276,7 @@
     }
     if ((tfd = fopen("diff.exe", "r")) != NULL)
     {
-	/* Use the diff.exe that comes with the self-extracting gvim.exe. */
+	// Use the diff.exe that comes with the self-extracting gvim.exe.
 	fclose(tfd);
 	fprintf(fd, "\n");
 	fprintf(fd, "\" Use the internal diff if available.\n");
@@ -1287,8 +1288,8 @@
 	fprintf(fd, "  let opt = '-a --binary '\n");
 	fprintf(fd, "  if &diffopt =~ 'icase' | let opt = opt . '-i ' | endif\n");
 	fprintf(fd, "  if &diffopt =~ 'iwhite' | let opt = opt . '-b ' | endif\n");
-	/* Use quotes only when needed, they may cause trouble.
-	 * Always escape "!". */
+	// Use quotes only when needed, they may cause trouble.
+	// Always escape "!".
 	fprintf(fd, "  let arg1 = v:fname_in\n");
 	fprintf(fd, "  if arg1 =~ ' ' | let arg1 = '\"' . arg1 . '\"' | endif\n");
 	fprintf(fd, "  let arg1 = substitute(arg1, '!', '\\!', 'g')\n");
@@ -1299,13 +1300,13 @@
 	fprintf(fd, "  if arg3 =~ ' ' | let arg3 = '\"' . arg3 . '\"' | endif\n");
 	fprintf(fd, "  let arg3 = substitute(arg3, '!', '\\!', 'g')\n");
 
-	/* If the path has a space:  When using cmd.exe (Win NT/2000/XP) put
-	 * quotes around the diff command and rely on the default value of
-	 * shellxquote to solve the quoting problem for the whole command.
-	 *
-	 * Otherwise put a double quote just before the space and at the
-	 * end of the command.  Putting quotes around the whole thing
-	 * doesn't work on Win 95/98/ME.  This is mostly guessed! */
+	// If the path has a space:  When using cmd.exe (Win NT/2000/XP) put
+	// quotes around the diff command and rely on the default value of
+	// shellxquote to solve the quoting problem for the whole command.
+	//
+	// Otherwise put a double quote just before the space and at the
+	// end of the command.  Putting quotes around the whole thing
+	// doesn't work on Win 95/98/ME.  This is mostly guessed!
 	fprintf(fd, "  if $VIMRUNTIME =~ ' '\n");
 	fprintf(fd, "    if &sh =~ '\\<cmd'\n");
 	fprintf(fd, "      if empty(&shellxquote)\n");
@@ -1336,7 +1337,7 @@
 {
     if (choices[idx].installfunc != NULL)
     {
-	/* Switch to NOT change or create a vimrc file. */
+	// Switch to NOT change or create a vimrc file.
 	if (*oldvimrc != NUL)
 	    alloc_text(idx, "Do NOT change startup file %s", oldvimrc);
 	else
@@ -1348,7 +1349,7 @@
     }
     else
     {
-	/* Switch to change or create a vimrc file. */
+	// Switch to change or create a vimrc file.
 	if (*oldvimrc != NUL)
 	    alloc_text(idx, "Overwrite startup file %s with:", oldvimrc);
 	else
@@ -1393,11 +1394,11 @@
     static void
 init_vimrc_choices(void)
 {
-    /* set path for a new _vimrc file (also when not used) */
+    // set path for a new _vimrc file (also when not used)
     strcpy(vimrc, installdir);
     strcpy(vimrc + runtimeidx, "_vimrc");
 
-    /* Set opposite value and then toggle it by calling change_vimrc_choice() */
+    // Set opposite value and then toggle it by calling change_vimrc_choice()
     if (*oldvimrc == NUL)
 	choices[choice_count].installfunc = NULL;
     else
@@ -1408,21 +1409,21 @@
     choices[choice_count].active = 1;
     ++choice_count;
 
-    /* default way to run Vim */
+    // default way to run Vim
     alloc_text(choice_count, compat_text, compat_choices[compat_choice]);
     choices[choice_count].changefunc = change_run_choice;
     choices[choice_count].installfunc = NULL;
     choices[choice_count].active = (*oldvimrc == NUL);
     ++choice_count;
 
-    /* Whether to remap keys */
+    // Whether to remap keys
     alloc_text(choice_count, remap_text , remap_choices[remap_choice]);
     choices[choice_count].changefunc = change_remap_choice;
     choices[choice_count].installfunc = NULL;
     choices[choice_count].active = (*oldvimrc == NUL);
     ++choice_count;
 
-    /* default way to use the mouse */
+    // default way to use the mouse
     alloc_text(choice_count, mouse_text, mouse_choices[mouse_choice]);
     choices[choice_count].changefunc = change_mouse_choice;
     choices[choice_count].installfunc = NULL;
@@ -1608,7 +1609,7 @@
  * - to add Vim to the "Open with..." list
  * - to uninstall Vim
  */
-/*ARGSUSED*/
+//ARGSUSED
     static int
 install_registry(void)
 {
@@ -1684,7 +1685,7 @@
 #endif
 	    );
 
-    /* For the NSIS installer use the generated uninstaller. */
+    // For the NSIS installer use the generated uninstaller.
     if (interactive)
 	sprintf(uninstall_string, "%s\\uninstall.exe", installdir);
     else
@@ -1737,7 +1738,7 @@
 	choices[choice_count].changefunc = change_popup_choice;
 	choices[choice_count].installfunc = NULL;
 	choices[choice_count].active = 1;
-	change_popup_choice(choice_count);  /* set the text */
+	change_popup_choice(choice_count);  // set the text
 	++choice_count;
     }
     else
@@ -1771,15 +1772,14 @@
 	choices[choice_count].changefunc = change_openwith_choice;
 	choices[choice_count].installfunc = NULL;
 	choices[choice_count].active = 1;
-	change_openwith_choice(choice_count);  /* set the text */
+	change_openwith_choice(choice_count);  // set the text
 	++choice_count;
     }
     else
 	add_dummy_choice();
 }
 
-/* create_shortcut
- *
+/*
  * Create a shell link.
  *
  * returns 0 on failure, non-zero on successful completion.
@@ -1800,7 +1800,7 @@
     HRESULT	    hres;
     IPersistFile	    *persistfile_ptr;
 
-    /* Initialize COM library */
+    // Initialize COM library
     hres = CoInitialize(NULL);
     if (!SUCCEEDED(hres))
     {
@@ -1808,18 +1808,18 @@
 	return FAIL;
     }
 
-    /* Instantiate a COM object for the ShellLink, store a pointer to it
-     * in shelllink_ptr.  */
+    // Instantiate a COM object for the ShellLink, store a pointer to it
+    // in shelllink_ptr.
     hres = CoCreateInstance(&CLSID_ShellLink,
 			   NULL,
 			   CLSCTX_INPROC_SERVER,
 			   &IID_IShellLink,
 			   (void **) &shelllink_ptr);
 
-    if (SUCCEEDED(hres)) /* If the instantiation was successful... */
+    if (SUCCEEDED(hres)) // If the instantiation was successful...
     {
-	/* ...Then build a PersistFile interface for the ShellLink so we can
-	 * save it as a file after we build it.  */
+	// ...Then build a PersistFile interface for the ShellLink so we can
+	// save it as a file after we build it.
 	hres = shelllink_ptr->lpVtbl->QueryInterface(shelllink_ptr,
 		&IID_IPersistFile, (void **) &persistfile_ptr);
 
@@ -1827,12 +1827,11 @@
 	{
 	    wchar_t wsz[BUFSIZE];
 
-	    /* translate the (possibly) multibyte shortcut filename to windows
-	     * Unicode so it can be used as a file name.
-	     */
+	    // translate the (possibly) multibyte shortcut filename to windows
+	    // Unicode so it can be used as a file name.
 	    MultiByteToWideChar(CP_ACP, 0, shortcut_name, -1, wsz, sizeof(wsz)/sizeof(wsz[0]));
 
-	    /* set the attributes */
+	    // set the attributes
 	    shelllink_ptr->lpVtbl->SetPath(shelllink_ptr, shortcut_target);
 	    shelllink_ptr->lpVtbl->SetWorkingDirectory(shelllink_ptr,
 								  workingdir);
@@ -1840,7 +1839,7 @@
 						    iconfile_path, iconindex);
 	    shelllink_ptr->lpVtbl->SetArguments(shelllink_ptr, shortcut_args);
 
-	    /* save the shortcut to a file and return the PersistFile object*/
+	    // save the shortcut to a file and return the PersistFile object
 	    persistfile_ptr->lpVtbl->Save(persistfile_ptr, wsz, 1);
 	    persistfile_ptr->lpVtbl->Release(persistfile_ptr);
 	}
@@ -1850,7 +1849,7 @@
 	    return FAIL;
 	}
 
-	/* Return the ShellLink object */
+	// Return the ShellLink object
 	shelllink_ptr->lpVtbl->Release(shelllink_ptr);
     }
     else
@@ -1882,11 +1881,11 @@
 	return FAIL;
     }
 
-    /* Make sure the directory exists (create Start Menu\Programs\Vim).
-     * Ignore errors if it already exists. */
+    // Make sure the directory exists (create Start Menu\Programs\Vim).
+    // Ignore errors if it already exists.
     vim_mkdir(shell_folder_path, 0755);
 
-    /* build the path to the shortcut and the path to gvim.exe */
+    // build the path to the shortcut and the path to gvim.exe
     sprintf(link_path, "%s\\%s.lnk", shell_folder_path, link_name);
 
     return OK;
@@ -1894,8 +1893,8 @@
 
     static int
 build_shortcut(
-	const char *name,	/* Name of the shortcut */
-	const char *exename,	/* Name of the executable (e.g., vim.exe) */
+	const char *name,	// Name of the shortcut
+	const char *exename,	// Name of the executable (e.g., vim.exe)
 	const char *args,
 	const char *shell_folder,
 	const char *workingdir)
@@ -1913,7 +1912,7 @@
 	return FAIL;
     }
 
-    /* Create the shortcut: */
+    // Create the shortcut:
     return create_shortcut(link_name, executable_path, 0,
 					   executable_path, args, workingdir);
 }
@@ -1965,8 +1964,8 @@
 		interactive ? "uninstall.exe" : "uninstall-gui.exe", "",
 					   VIM_STARTMENU, installdir) == FAIL)
 	return;
-    /* For Windows NT the working dir of the vimtutor.bat must be right,
-     * otherwise gvim.exe won't be found and using gvimbat doesn't work. */
+    // For Windows NT the working dir of the vimtutor.bat must be right,
+    // otherwise gvim.exe won't be found and using gvimbat doesn't work.
     if (build_shortcut("Vim tutor", "vimtutor.bat", "",
 					   VIM_STARTMENU, installdir) == FAIL)
 	return;
@@ -1976,7 +1975,7 @@
     {
 	char	shell_folder_path[BUFSIZE];
 
-	/* Creating the URL shortcut works a bit differently... */
+	// Creating the URL shortcut works a bit differently...
 	if (get_shell_folder_path(shell_folder_path, VIM_STARTMENU) == FAIL)
 	{
 	    printf("Finding the path of the Start menu failed\n");
@@ -2020,7 +2019,7 @@
     void
 install_shortcut_gvim(int idx)
 {
-    /* Create shortcut(s) on the desktop */
+    // Create shortcut(s) on the desktop
     if (choices[idx].arg)
     {
 	(void)build_shortcut(icon_names[0], "gvim.exe",
@@ -2077,11 +2076,11 @@
     static void
 init_startmenu_choice(void)
 {
-    /* Start menu */
+    // Start menu
     choices[choice_count].changefunc = toggle_startmenu_choice;
     choices[choice_count].installfunc = NULL;
     choices[choice_count].active = 1;
-    toggle_startmenu_choice(choice_count);	/* set the text */
+    toggle_startmenu_choice(choice_count);	// set the text
     ++choice_count;
 }
 
@@ -2091,7 +2090,7 @@
     static void
 init_shortcut_choices(void)
 {
-    /* Shortcut to gvim */
+    // Shortcut to gvim
     choices[choice_count].text = NULL;
     choices[choice_count].arg = 0;
     choices[choice_count].active = has_gvim;
@@ -2100,7 +2099,7 @@
     toggle_shortcut_choice(choice_count);
     ++choice_count;
 
-    /* Shortcut to evim */
+    // Shortcut to evim
     choices[choice_count].text = NULL;
     choices[choice_count].arg = 0;
     choices[choice_count].active = has_gvim;
@@ -2109,7 +2108,7 @@
     toggle_shortcut_choice(choice_count);
     ++choice_count;
 
-    /* Shortcut to gview */
+    // Shortcut to gview
     choices[choice_count].text = NULL;
     choices[choice_count].arg = 0;
     choices[choice_count].active = has_gvim;
@@ -2145,7 +2144,7 @@
     long last_char_to_copy;
     long path_length = strlen(path);
 
-    /* skip the last character just in case it is a '\\' */
+    // skip the last character just in case it is a '\\'
     last_char_to_copy = path_length - 2;
     c = path[last_char_to_copy];
 
@@ -2264,7 +2263,7 @@
 {
     int	    choice_count = TABLE_SIZE(vimfiles_dir_choices);
 
-    /* Don't offer the $HOME choice if $HOME isn't set. */
+    // Don't offer the $HOME choice if $HOME isn't set.
     if (homedir == NULL)
 	--choice_count;
     choices[idx].arg = get_choice(vimfiles_dir_choices, choice_count);
@@ -2274,7 +2273,7 @@
 /*
  * Create the plugin directories...
  */
-/*ARGSUSED*/
+//ARGSUSED
     static void
 install_vimfilesdir(int idx)
 {
@@ -2285,18 +2284,18 @@
     char vimfiles_path[MAX_PATH + 9];
     char tmp_dirname[BUFSIZE];
 
-    /* switch on the location that the user wants the plugin directories
-     * built in */
+    // switch on the location that the user wants the plugin directories
+    // built in
     switch (vimfiles_dir_choice)
     {
 	case vimfiles_dir_vim:
 	{
-	    /* Go to the %VIM% directory - check env first, then go one dir
-	     *	   below installdir if there is no %VIM% environment variable.
-	     *	   The accuracy of $VIM is checked in inspect_system(), so we
-	     *	   can be sure it is ok to use here. */
+	    // Go to the %VIM% directory - check env first, then go one dir
+	    //	   below installdir if there is no %VIM% environment variable.
+	    //	   The accuracy of $VIM is checked in inspect_system(), so we
+	    //	   can be sure it is ok to use here.
 	    p = getenv("VIM");
-	    if (p == NULL) /* No $VIM in path */
+	    if (p == NULL) // No $VIM in path
 		dir_remove_last(installdir, vimdir_path);
 	    else
 		strcpy(vimdir_path, p);
@@ -2321,8 +2320,8 @@
 	}
     }
 
-    /* Now, just create the directory.	If it already exists, it will fail
-     * silently.  */
+    // Now, just create the directory.	If it already exists, it will fail
+    // silently.
     sprintf(vimfiles_path, "%s\\vimfiles", vimdir_path);
     vim_mkdir(vimfiles_path, 0755);
 
@@ -2386,25 +2385,25 @@
     static void
 setup_choices(void)
 {
-    /* install the batch files */
+    // install the batch files
     init_bat_choices();
 
-    /* (over) write _vimrc file */
+    // (over) write _vimrc file
     init_vimrc_choices();
 
-    /* Whether to add Vim to the popup menu */
+    // Whether to add Vim to the popup menu
     init_popup_choice();
 
-    /* Whether to add Vim to the "Open With..." menu */
+    // Whether to add Vim to the "Open With..." menu
     init_openwith_choice();
 
-    /* Whether to add Vim to the Start Menu. */
+    // Whether to add Vim to the Start Menu.
     init_startmenu_choice();
 
-    /* Whether to add shortcuts to the Desktop. */
+    // Whether to add shortcuts to the Desktop.
     init_shortcut_choices();
 
-    /* Whether to create the runtime directories. */
+    // Whether to create the runtime directories.
     init_directories_choice();
 }
 
@@ -2473,9 +2472,8 @@
 	}
 	else if (strcmp(argv[i], "-create-vimrc") == 0)
 	{
-	    /* Setup default vimrc choices.  If there is already a _vimrc file,
-	     * it will NOT be overwritten.
-	     */
+	    // Setup default vimrc choices.  If there is already a _vimrc file,
+	    // it will NOT be overwritten.
 	    init_vimrc_choices();
 	}
 	else if (strcmp(argv[i], "-vimrc-remap") == 0)
@@ -2554,15 +2552,15 @@
 		    print_cmd_line_help();
 		}
 	    }
-	    else /* No choice specified, default to vim directory */
+	    else // No choice specified, default to vim directory
 		vimfiles_dir_choice = (int)vimfiles_dir_vim;
 	    choices[choice_count - 1].arg = vimfiles_dir_choice;
 	}
 	else if (strcmp(argv[i], "-register-OLE") == 0)
 	{
-	    /* This is always done when gvim is found */
+	    // This is always done when gvim is found
 	}
-	else /* Unknown switch */
+	else // Unknown switch
 	{
 	    printf("Got unknown argument argv[%d] = %s\n", i, argv[i]);
 	    print_cmd_line_help();
@@ -2707,19 +2705,19 @@
 {
     int		i;
 
-    /* Install the selected choices. */
+    // Install the selected choices.
     for (i = 0; i < choice_count; ++i)
 	if (choices[i].installfunc != NULL && choices[i].active)
 	    (choices[i].installfunc)(i);
 
-    /* Add some entries to the registry, if needed. */
+    // Add some entries to the registry, if needed.
     if (install_popup
 	    || install_openwith
 	    || (need_uninstall_entry && interactive)
 	    || !interactive)
 	install_registry();
 
-    /* Register gvim with OLE. */
+    // Register gvim with OLE.
     if (has_gvim)
 	install_OLE_register();
 }
@@ -2754,21 +2752,21 @@
     else
 	interactive = 1;
 
-    /* Initialize this program. */
+    // Initialize this program.
     do_inits(argv);
     init_homedir();
 
     if (argc > 1 && strcmp(argv[1], "-uninstall-check") == 0)
     {
-	/* Only check for already installed Vims.  Used by NSIS installer. */
+	// Only check for already installed Vims.  Used by NSIS installer.
 	i = uninstall_check(1);
 
-	/* Find the value of $VIM, because NSIS isn't able to do this by
-	 * itself. */
+	// Find the value of $VIM, because NSIS isn't able to do this by
+	// itself.
 	get_vim_env();
 
-	/* When nothing found exit quietly.  If something found wait for
-	 * a little while, so that the user can read the messages. */
+	// When nothing found exit quietly.  If something found wait for
+	// a little while, so that the user can read the messages.
 	if (i && _isatty(1))
 	    sleep(3);
 	exit(0);
@@ -2777,22 +2775,22 @@
     printf("This program sets up the installation of Vim "
 						   VIM_VERSION_MEDIUM "\n\n");
 
-    /* Check if the user unpacked the archives properly. */
+    // Check if the user unpacked the archives properly.
     check_unpack();
 
-    /* Check for already installed Vims. */
+    // Check for already installed Vims.
     if (interactive)
 	uninstall_check(0);
 
-    /* Find out information about the system. */
+    // Find out information about the system.
     inspect_system();
 
     if (interactive)
     {
-	/* Setup all the choices. */
+	// Setup all the choices.
 	setup_choices();
 
-	/* Let the user change choices and finally install (or quit). */
+	// Let the user change choices and finally install (or quit).
 	for (;;)
 	{
 	    request_choice();
@@ -2801,7 +2799,7 @@
 	    {
 		if (isdigit(buf[0]))
 		{
-		    /* Change a choice. */
+		    // Change a choice.
 		    i = atoi(buf);
 		    if (i > 0 && i <= choice_count && choices[i - 1].active)
 			(choices[i - 1].changefunc)(i - 1);
@@ -2810,19 +2808,19 @@
 		}
 		else if (buf[0] == 'h' || buf[0] == 'H')
 		{
-		    /* Help */
+		    // Help
 		    show_help();
 		}
 		else if (buf[0] == 'd' || buf[0] == 'D')
 		{
-		    /* Install! */
+		    // Install!
 		    install();
 		    printf("\nThat finishes the installation.  Happy Vimming!\n");
 		    break;
 		}
 		else if (buf[0] == 'q' || buf[0] == 'Q')
 		{
-		    /* Quit */
+		    // Quit
 		    printf("\nExiting without anything done\n");
 		    break;
 		}
@@ -2841,8 +2839,8 @@
 	command_line_setup_choices(argc, argv);
 	install();
 
-	/* Avoid that the user has to hit Enter, just wait a little bit to
-	 * allow reading the messages. */
+	// Avoid that the user has to hit Enter, just wait a little bit to
+	// allow reading the messages.
 	sleep(2);
     }
 
diff --git a/src/edit.c b/src/edit.c
index 4f53333..c67f67c 100644
--- a/src/edit.c
+++ b/src/edit.c
@@ -18,8 +18,8 @@
 #define BACKSPACE_WORD_NOT_SPACE    3
 #define BACKSPACE_LINE		    4
 
-/* Set when doing something for completion that may call edit() recursively,
- * which is not allowed. */
+// Set when doing something for completion that may call edit() recursively,
+// which is not allowed.
 static int	compl_busy = FALSE;
 
 
@@ -79,30 +79,30 @@
 static char_u *do_insert_char_pre(int c);
 #endif
 
-static colnr_T	Insstart_textlen;	/* length of line when insert started */
-static colnr_T	Insstart_blank_vcol;	/* vcol for first inserted blank */
-static int	update_Insstart_orig = TRUE; /* set Insstart_orig to Insstart */
+static colnr_T	Insstart_textlen;	// length of line when insert started
+static colnr_T	Insstart_blank_vcol;	// vcol for first inserted blank
+static int	update_Insstart_orig = TRUE; // set Insstart_orig to Insstart
 
-static char_u	*last_insert = NULL;	/* the text of the previous insert,
-					   K_SPECIAL and CSI are escaped */
-static int	last_insert_skip; /* nr of chars in front of previous insert */
-static int	new_insert_skip;  /* nr of chars in front of current insert */
-static int	did_restart_edit;	/* "restart_edit" when calling edit() */
+static char_u	*last_insert = NULL;	// the text of the previous insert,
+					// K_SPECIAL and CSI are escaped
+static int	last_insert_skip; // nr of chars in front of previous insert
+static int	new_insert_skip;  // nr of chars in front of current insert
+static int	did_restart_edit;	// "restart_edit" when calling edit()
 
 #ifdef FEAT_CINDENT
-static int	can_cindent;		/* may do cindenting on this line */
+static int	can_cindent;		// may do cindenting on this line
 #endif
 
 #ifdef FEAT_RIGHTLEFT
-static int	revins_on;		/* reverse insert mode on */
-static int	revins_chars;		/* how much to skip after edit */
-static int	revins_legal;		/* was the last char 'legal'? */
-static int	revins_scol;		/* start column of revins session */
+static int	revins_on;		// reverse insert mode on
+static int	revins_chars;		// how much to skip after edit
+static int	revins_legal;		// was the last char 'legal'?
+static int	revins_scol;		// start column of revins session
 #endif
 
-static int	ins_need_undo;		/* call u_save() before inserting a
-					   char.  Set when edit() is called.
-					   after that arrow_used is used. */
+static int	ins_need_undo;		// call u_save() before inserting a
+					// char.  Set when edit() is called.
+					// after that arrow_used is used.
 
 static int	did_add_space = FALSE;	// auto_format() added an extra space
 					// under the cursor
@@ -131,7 +131,7 @@
     int
 edit(
     int		cmdchar,
-    int		startln,	/* if set, insert at start of line */
+    int		startln,	// if set, insert at start of line
     long	count)
 {
     int		c = 0;
@@ -140,54 +140,54 @@
     int		mincol;
     static linenr_T o_lnum = 0;
     int		i;
-    int		did_backspace = TRUE;	    /* previous char was backspace */
+    int		did_backspace = TRUE;	    // previous char was backspace
 #ifdef FEAT_CINDENT
-    int		line_is_white = FALSE;	    /* line is empty before insert */
+    int		line_is_white = FALSE;	    // line is empty before insert
 #endif
-    linenr_T	old_topline = 0;	    /* topline before insertion */
+    linenr_T	old_topline = 0;	    // topline before insertion
 #ifdef FEAT_DIFF
     int		old_topfill = -1;
 #endif
-    int		inserted_space = FALSE;     /* just inserted a space */
+    int		inserted_space = FALSE;     // just inserted a space
     int		replaceState = REPLACE;
-    int		nomove = FALSE;		    /* don't move cursor on return */
+    int		nomove = FALSE;		    // don't move cursor on return
 #ifdef FEAT_JOB_CHANNEL
     int		cmdchar_todo = cmdchar;
 #endif
 
-    /* Remember whether editing was restarted after CTRL-O. */
+    // Remember whether editing was restarted after CTRL-O.
     did_restart_edit = restart_edit;
 
-    /* sleep before redrawing, needed for "CTRL-O :" that results in an
-     * error message */
+    // sleep before redrawing, needed for "CTRL-O :" that results in an
+    // error message
     check_for_delay(TRUE);
 
-    /* set Insstart_orig to Insstart */
+    // set Insstart_orig to Insstart
     update_Insstart_orig = TRUE;
 
 #ifdef HAVE_SANDBOX
-    /* Don't allow inserting in the sandbox. */
+    // Don't allow inserting in the sandbox.
     if (sandbox != 0)
     {
 	emsg(_(e_sandbox));
 	return FALSE;
     }
 #endif
-    /* Don't allow changes in the buffer while editing the cmdline.  The
-     * caller of getcmdline() may get confused. */
+    // Don't allow changes in the buffer while editing the cmdline.  The
+    // caller of getcmdline() may get confused.
     if (textlock != 0)
     {
 	emsg(_(e_secure));
 	return FALSE;
     }
 
-    /* Don't allow recursive insert mode when busy with completion. */
+    // Don't allow recursive insert mode when busy with completion.
     if (ins_compl_active() || compl_busy || pum_visible())
     {
 	emsg(_(e_secure));
 	return FALSE;
     }
-    ins_compl_clear();	    /* clear stuff for CTRL-X mode */
+    ins_compl_clear();	    // clear stuff for CTRL-X mode
 
     /*
      * Trigger InsertEnter autocommands.  Do not do this for "r<CR>" or "grx".
@@ -204,16 +204,16 @@
 	else
 	    ptr = (char_u *)"i";
 	set_vim_var_string(VV_INSERTMODE, ptr, 1);
-	set_vim_var_string(VV_CHAR, NULL, -1);  /* clear v:char */
+	set_vim_var_string(VV_CHAR, NULL, -1);  // clear v:char
 #endif
 	ins_apply_autocmds(EVENT_INSERTENTER);
 
-	/* Make sure the cursor didn't move.  Do call check_cursor_col() in
-	 * case the text was modified.  Since Insert mode was not started yet
-	 * a call to check_cursor_col() may move the cursor, especially with
-	 * the "A" command, thus set State to avoid that. Also check that the
-	 * line number is still valid (lines may have been deleted).
-	 * Do not restore if v:char was set to a non-empty string. */
+	// Make sure the cursor didn't move.  Do call check_cursor_col() in
+	// case the text was modified.  Since Insert mode was not started yet
+	// a call to check_cursor_col() may move the cursor, especially with
+	// the "A" command, thus set State to avoid that. Also check that the
+	// line number is still valid (lines may have been deleted).
+	// Do not restore if v:char was set to a non-empty string.
 	if (!EQUAL_POS(curwin->w_cursor, save_cursor)
 #ifdef FEAT_EVAL
 		&& *get_vim_var_str(VV_CHAR) == NUL
@@ -230,8 +230,8 @@
     }
 
 #ifdef FEAT_CONCEAL
-    /* Check if the cursor line needs redrawing before changing State.  If
-     * 'concealcursor' is "n" it needs to be redrawn without concealing. */
+    // Check if the cursor line needs redrawing before changing State.  If
+    // 'concealcursor' is "n" it needs to be redrawn without concealing.
     conceal_check_cursor_line();
 #endif
 
@@ -258,7 +258,7 @@
 	AppendNumberToRedobuff(count);
 	if (cmdchar == 'V' || cmdchar == 'v')
 	{
-	    /* "gR" or "gr" command */
+	    // "gR" or "gr" command
 	    AppendCharToRedobuff('g');
 	    AppendCharToRedobuff((cmdchar == 'v') ? 'r' : 'R');
 	}
@@ -268,10 +268,10 @@
 		AppendCharToRedobuff('a');
 	    else
 		AppendCharToRedobuff(cmdchar);
-	    if (cmdchar == 'g')		    /* "gI" command */
+	    if (cmdchar == 'g')		    // "gI" command
 		AppendCharToRedobuff('I');
-	    else if (cmdchar == 'r')	    /* "r<CR>" command */
-		count = 1;		    /* insert only one <CR> */
+	    else if (cmdchar == 'r')	    // "r<CR>" command
+		count = 1;		    // insert only one <CR>
 	}
     }
 
@@ -314,7 +314,7 @@
     clear_showcmd();
 #endif
 #ifdef FEAT_RIGHTLEFT
-    /* there is no reverse replace mode */
+    // there is no reverse replace mode
     revins_on = (State == INSERT && p_ri);
     if (revins_on)
 	undisplay_dollar();
@@ -377,10 +377,10 @@
     else
 	arrow_used = FALSE;
 
-    /* we are in insert mode now, don't need to start it anymore */
+    // we are in insert mode now, don't need to start it anymore
     need_start_insertmode = FALSE;
 
-    /* Need to save the line for undo before inserting the first char. */
+    // Need to save the line for undo before inserting the first char.
     ins_need_undo = TRUE;
 
     where_paste_started.lnum = 0;
@@ -388,8 +388,8 @@
     can_cindent = TRUE;
 #endif
 #ifdef FEAT_FOLDING
-    /* The cursor line is not in a closed fold, unless 'insertmode' is set or
-     * restarting. */
+    // The cursor line is not in a closed fold, unless 'insertmode' is set or
+    // restarting.
     if (!p_im && did_restart_edit == 0)
 	foldOpenCursor();
 #endif
@@ -407,10 +407,10 @@
 	change_warning(i == 0 ? 0 : i + 1);
 
 #ifdef CURSOR_SHAPE
-    ui_cursor_shape();		/* may show different cursor shape */
+    ui_cursor_shape();		// may show different cursor shape
 #endif
 #ifdef FEAT_DIGRAPHS
-    do_digraph(-1);		/* clear digraphs */
+    do_digraph(-1);		// clear digraphs
 #endif
 
     /*
@@ -435,11 +435,11 @@
     {
 #ifdef FEAT_RIGHTLEFT
 	if (!revins_legal)
-	    revins_scol = -1;	    /* reset on illegal motions */
+	    revins_scol = -1;	    // reset on illegal motions
 	else
 	    revins_legal = 0;
 #endif
-	if (arrow_used)	    /* don't repeat insert when arrow key used */
+	if (arrow_used)	    // don't repeat insert when arrow key used
 	    count = 0;
 
 	if (update_Insstart_orig)
@@ -447,17 +447,17 @@
 
 	if (stop_insert_mode && !pum_visible())
 	{
-	    /* ":stopinsert" used or 'insertmode' reset */
+	    // ":stopinsert" used or 'insertmode' reset
 	    count = 0;
 	    goto doESCkey;
 	}
 
-	/* set curwin->w_curswant for next K_DOWN or K_UP */
+	// set curwin->w_curswant for next K_DOWN or K_UP
 	if (!arrow_used)
 	    curwin->w_set_curswant = TRUE;
 
-	/* If there is no typeahead may check for timestamps (e.g., for when a
-	 * menu invoked a shell command). */
+	// If there is no typeahead may check for timestamps (e.g., for when a
+	// menu invoked a shell command).
 	if (stuff_empty())
 	{
 	    did_check_timestamps = FALSE;
@@ -471,18 +471,18 @@
 	msg_scroll = FALSE;
 
 #ifdef FEAT_GUI
-	/* When 'mousefocus' is set a mouse movement may have taken us to
-	 * another window.  "need_mouse_correct" may then be set because of an
-	 * autocommand. */
+	// When 'mousefocus' is set a mouse movement may have taken us to
+	// another window.  "need_mouse_correct" may then be set because of an
+	// autocommand.
 	if (need_mouse_correct)
 	    gui_mouse_correct();
 #endif
 
 #ifdef FEAT_FOLDING
-	/* Open fold at the cursor line, according to 'foldopen'. */
+	// Open fold at the cursor line, according to 'foldopen'.
 	if (fdo_flags & FDO_INSERT)
 	    foldOpenCursor();
-	/* Close folds where the cursor isn't, according to 'foldclose' */
+	// Close folds where the cursor isn't, according to 'foldclose'
 	if (!char_avail())
 	    foldCheckClose();
 #endif
@@ -546,12 +546,12 @@
 	    }
 	}
 
-	/* May need to adjust w_topline to show the cursor. */
+	// May need to adjust w_topline to show the cursor.
 	update_topline();
 
 	did_backspace = FALSE;
 
-	validate_cursor();		/* may set must_redraw */
+	validate_cursor();		// may set must_redraw
 
 	/*
 	 * Redraw the display when no characters are waiting.
@@ -571,22 +571,22 @@
 #endif
 
 #ifdef USE_ON_FLY_SCROLL
-	dont_scroll = FALSE;		/* allow scrolling here */
+	dont_scroll = FALSE;		// allow scrolling here
 #endif
 
 	/*
 	 * Get a character for Insert mode.  Ignore K_IGNORE and K_NOP.
 	 */
 	if (c != K_CURSORHOLD)
-	    lastc = c;		/* remember the previous char for CTRL-D */
+	    lastc = c;		// remember the previous char for CTRL-D
 
-	/* After using CTRL-G U the next cursor key will not break undo. */
+	// After using CTRL-G U the next cursor key will not break undo.
 	if (dont_sync_undo == MAYBE)
 	    dont_sync_undo = TRUE;
 	else
 	    dont_sync_undo = FALSE;
 	if (cmdchar == K_PS)
-	    /* Got here from normal mode when bracketed paste started. */
+	    // Got here from normal mode when bracketed paste started.
 	    c = K_PS;
 	else
 	    do
@@ -602,12 +602,12 @@
 		}
 	    } while (c == K_IGNORE || c == K_NOP);
 
-	/* Don't want K_CURSORHOLD for the second key, e.g., after CTRL-V. */
+	// Don't want K_CURSORHOLD for the second key, e.g., after CTRL-V.
 	did_cursorhold = TRUE;
 
 #ifdef FEAT_RIGHTLEFT
 	if (p_hkmap && KeyTyped)
-	    c = hkmap(c);		/* Hebrew mode mapping */
+	    c = hkmap(c);		// Hebrew mode mapping
 #endif
 
 	/*
@@ -620,18 +620,18 @@
 		&& curwin->w_cursor.col >= ins_compl_col()
 		&& ins_compl_has_shown_match())
 	{
-	    /* BS: Delete one character from "compl_leader". */
+	    // BS: Delete one character from "compl_leader".
 	    if ((c == K_BS || c == Ctrl_H)
 			&& curwin->w_cursor.col > ins_compl_col()
 			&& (c = ins_compl_bs()) == NUL)
 		continue;
 
-	    /* When no match was selected or it was edited. */
+	    // When no match was selected or it was edited.
 	    if (!ins_compl_used_match())
 	    {
-		/* CTRL-L: Add one character from the current match to
-		 * "compl_leader".  Except when at the original match and
-		 * there is nothing to add, CTRL-L works like CTRL-P then. */
+		// CTRL-L: Add one character from the current match to
+		// "compl_leader".  Except when at the original match and
+		// there is nothing to add, CTRL-L works like CTRL-P then.
 		if (c == Ctrl_L
 			&& (!ctrl_x_mode_line_or_eval()
 			    || ins_compl_long_shown_match()))
@@ -640,12 +640,12 @@
 		    continue;
 		}
 
-		/* A non-white character that fits in with the current
-		 * completion: Add to "compl_leader". */
+		// A non-white character that fits in with the current
+		// completion: Add to "compl_leader".
 		if (ins_compl_accept_char(c))
 		{
 #if defined(FEAT_EVAL)
-		    /* Trigger InsertCharPre. */
+		    // Trigger InsertCharPre.
 		    char_u *str = do_insert_char_pre(c);
 		    char_u *p;
 
@@ -661,9 +661,9 @@
 		    continue;
 		}
 
-		/* Pressing CTRL-Y selects the current match.  When
-		 * ins_compl_enter_selects() is set the Enter key does the
-		 * same. */
+		// Pressing CTRL-Y selects the current match.  When
+		// ins_compl_enter_selects() is set the Enter key does the
+		// same.
 		if ((c == Ctrl_Y || (ins_compl_enter_selects()
 				    && (c == CAR || c == K_KENTER || c == NL)))
 			&& stop_arrow() == OK)
@@ -674,18 +674,18 @@
 	    }
 	}
 
-	/* Prepare for or stop CTRL-X mode.  This doesn't do completion, but
-	 * it does fix up the text when finishing completion. */
+	// Prepare for or stop CTRL-X mode.  This doesn't do completion, but
+	// it does fix up the text when finishing completion.
 	ins_compl_init_get_longest();
 	if (ins_compl_prep(c))
 	    continue;
 
-	/* CTRL-\ CTRL-N goes to Normal mode,
-	 * CTRL-\ CTRL-G goes to mode selected with 'insertmode',
-	 * CTRL-\ CTRL-O is like CTRL-O but without moving the cursor.  */
+	// CTRL-\ CTRL-N goes to Normal mode,
+	// CTRL-\ CTRL-G goes to mode selected with 'insertmode',
+	// CTRL-\ CTRL-O is like CTRL-O but without moving the cursor.
 	if (c == Ctrl_BSL)
 	{
-	    /* may need to redraw when no more chars available now */
+	    // may need to redraw when no more chars available now
 	    ins_redraw(FALSE);
 	    ++no_mapping;
 	    ++allow_keys;
@@ -694,7 +694,7 @@
 	    --allow_keys;
 	    if (c != Ctrl_N && c != Ctrl_G && c != Ctrl_O)
 	    {
-		/* it's something else */
+		// it's something else
 		vungetc(c);
 		c = Ctrl_BSL;
 	    }
@@ -705,7 +705,7 @@
 		if (c == Ctrl_O)
 		{
 		    ins_ctrl_o();
-		    ins_at_eol = FALSE;	/* cursor keeps its column */
+		    ins_at_eol = FALSE;	// cursor keeps its column
 		    nomove = TRUE;
 		}
 		count = 0;
@@ -722,17 +722,17 @@
 	if (c == Ctrl_V || c == Ctrl_Q)
 	{
 	    ins_ctrl_v();
-	    c = Ctrl_V;	/* pretend CTRL-V is last typed character */
+	    c = Ctrl_V;	// pretend CTRL-V is last typed character
 	    continue;
 	}
 
 #ifdef FEAT_CINDENT
 	if (cindent_on() && ctrl_x_mode_none())
 	{
-	    /* A key name preceded by a bang means this key is not to be
-	     * inserted.  Skip ahead to the re-indenting below.
-	     * A key name preceded by a star means that indenting has to be
-	     * done before inserting the key. */
+	    // A key name preceded by a bang means this key is not to be
+	    // inserted.  Skip ahead to the re-indenting below.
+	    // A key name preceded by a star means that indenting has to be
+	    // done before inserting the key.
 	    line_is_white = inindent(0);
 	    if (in_cinkeys(c, '!', line_is_white))
 		goto force_cindent;
@@ -768,18 +768,18 @@
 	 */
 	switch (c)
 	{
-	case ESC:	/* End input mode */
+	case ESC:	// End input mode
 	    if (echeck_abbr(ESC + ABBR_OFF))
 		break;
-	    /* FALLTHROUGH */
+	    // FALLTHROUGH
 
-	case Ctrl_C:	/* End input mode */
+	case Ctrl_C:	// End input mode
 #ifdef FEAT_CMDWIN
 	    if (c == Ctrl_C && cmdwin_type != 0)
 	    {
-		/* Close the cmdline window. */
+		// Close the cmdline window.
 		cmdwin_result = K_IGNORE;
-		got_int = FALSE; /* don't stop executing autocommands et al. */
+		got_int = FALSE; // don't stop executing autocommands et al.
 		nomove = TRUE;
 		goto doESCkey;
 	    }
@@ -801,13 +801,13 @@
 #ifdef UNIX
 do_intr:
 #endif
-	    /* when 'insertmode' set, and not halfway a mapping, don't leave
-	     * Insert mode */
+	    // when 'insertmode' set, and not halfway a mapping, don't leave
+	    // Insert mode
 	    if (goto_im())
 	    {
 		if (got_int)
 		{
-		    (void)vgetc();		/* flush all buffers */
+		    (void)vgetc();		// flush all buffers
 		    got_int = FALSE;
 		}
 		else
@@ -818,8 +818,8 @@
 	    /*
 	     * This is the ONLY return from edit()!
 	     */
-	    /* Always update o_lnum, so that a "CTRL-O ." that adds a line
-	     * still puts the cursor back after the inserted text. */
+	    // Always update o_lnum, so that a "CTRL-O ." that adds a line
+	    // still puts the cursor back after the inserted text.
 	    if (ins_at_eol && gchar_cursor() == NUL)
 		o_lnum = curwin->w_cursor.lnum;
 
@@ -835,16 +835,16 @@
 	    }
 	    continue;
 
-	case Ctrl_Z:	/* suspend when 'insertmode' set */
+	case Ctrl_Z:	// suspend when 'insertmode' set
 	    if (!p_im)
-		goto normalchar;	/* insert CTRL-Z as normal char */
+		goto normalchar;	// insert CTRL-Z as normal char
 	    do_cmdline_cmd((char_u *)"stop");
 #ifdef CURSOR_SHAPE
-	    ui_cursor_shape();		/* may need to update cursor shape */
+	    ui_cursor_shape();		// may need to update cursor shape
 #endif
 	    continue;
 
-	case Ctrl_O:	/* execute one command */
+	case Ctrl_O:	// execute one command
 #ifdef FEAT_COMPL_FUNC
 	    if (ctrl_x_mode_omni())
 		goto docomplete;
@@ -853,7 +853,7 @@
 		break;
 	    ins_ctrl_o();
 
-	    /* don't move the cursor left when 'virtualedit' has "onemore". */
+	    // don't move the cursor left when 'virtualedit' has "onemore".
 	    if (ve_flags & VE_ONEMORE)
 	    {
 		ins_at_eol = FALSE;
@@ -862,15 +862,15 @@
 	    count = 0;
 	    goto doESCkey;
 
-	case K_INS:	/* toggle insert/replace mode */
+	case K_INS:	// toggle insert/replace mode
 	case K_KINS:
 	    ins_insert(replaceState);
 	    break;
 
-	case K_SELECT:	/* end of Select mode mapping - ignore */
+	case K_SELECT:	// end of Select mode mapping - ignore
 	    break;
 
-	case K_HELP:	/* Help key works like <ESC> <Help> */
+	case K_HELP:	// Help key works like <ESC> <Help>
 	case K_F1:
 	case K_XF1:
 	    stuffcharReadbuff(K_HELP);
@@ -879,55 +879,55 @@
 	    goto doESCkey;
 
 #ifdef FEAT_NETBEANS_INTG
-	case K_F21:	/* NetBeans command */
-	    ++no_mapping;		/* don't map the next key hits */
+	case K_F21:	// NetBeans command
+	    ++no_mapping;		// don't map the next key hits
 	    i = plain_vgetc();
 	    --no_mapping;
 	    netbeans_keycommand(i);
 	    break;
 #endif
 
-	case K_ZERO:	/* Insert the previously inserted text. */
+	case K_ZERO:	// Insert the previously inserted text.
 	case NUL:
 	case Ctrl_A:
-	    /* For ^@ the trailing ESC will end the insert, unless there is an
-	     * error.  */
+	    // For ^@ the trailing ESC will end the insert, unless there is an
+	    // error.
 	    if (stuff_inserted(NUL, 1L, (c == Ctrl_A)) == FAIL
 						   && c != Ctrl_A && !p_im)
-		goto doESCkey;		/* quit insert mode */
+		goto doESCkey;		// quit insert mode
 	    inserted_space = FALSE;
 	    break;
 
-	case Ctrl_R:	/* insert the contents of a register */
+	case Ctrl_R:	// insert the contents of a register
 	    ins_reg();
 	    auto_format(FALSE, TRUE);
 	    inserted_space = FALSE;
 	    break;
 
-	case Ctrl_G:	/* commands starting with CTRL-G */
+	case Ctrl_G:	// commands starting with CTRL-G
 	    ins_ctrl_g();
 	    break;
 
-	case Ctrl_HAT:	/* switch input mode and/or langmap */
+	case Ctrl_HAT:	// switch input mode and/or langmap
 	    ins_ctrl_hat();
 	    break;
 
 #ifdef FEAT_RIGHTLEFT
-	case Ctrl__:	/* switch between languages */
+	case Ctrl__:	// switch between languages
 	    if (!p_ari)
 		goto normalchar;
 	    ins_ctrl_();
 	    break;
 #endif
 
-	case Ctrl_D:	/* Make indent one shiftwidth smaller. */
+	case Ctrl_D:	// Make indent one shiftwidth smaller.
 #if defined(FEAT_FIND_ID)
 	    if (ctrl_x_mode_path_defines())
 		goto docomplete;
 #endif
-	    /* FALLTHROUGH */
+	    // FALLTHROUGH
 
-	case Ctrl_T:	/* Make indent one shiftwidth greater. */
+	case Ctrl_T:	// Make indent one shiftwidth greater.
 	    if (c == Ctrl_T && ctrl_x_mode_thesaurus())
 	    {
 		if (has_compl_option(FALSE))
@@ -940,19 +940,19 @@
 	    inserted_space = FALSE;
 	    break;
 
-	case K_DEL:	/* delete character under the cursor */
+	case K_DEL:	// delete character under the cursor
 	case K_KDEL:
 	    ins_del();
 	    auto_format(FALSE, TRUE);
 	    break;
 
-	case K_BS:	/* delete character before the cursor */
+	case K_BS:	// delete character before the cursor
 	case Ctrl_H:
 	    did_backspace = ins_bs(c, BACKSPACE_CHAR, &inserted_space);
 	    auto_format(FALSE, TRUE);
 	    break;
 
-	case Ctrl_W:	/* delete word before the cursor */
+	case Ctrl_W:	// delete word before the cursor
 #ifdef FEAT_JOB_CHANNEL
 	    if (bt_prompt(curbuf) && (mod_mask & MOD_MASK_SHIFT) == 0)
 	    {
@@ -969,9 +969,9 @@
 	    auto_format(FALSE, TRUE);
 	    break;
 
-	case Ctrl_U:	/* delete all inserted text in current line */
+	case Ctrl_U:	// delete all inserted text in current line
 # ifdef FEAT_COMPL_FUNC
-	    /* CTRL-X CTRL-U completes with 'completefunc'. */
+	    // CTRL-X CTRL-U completes with 'completefunc'.
 	    if (ctrl_x_mode_function())
 		goto docomplete;
 # endif
@@ -980,7 +980,7 @@
 	    inserted_space = FALSE;
 	    break;
 
-	case K_LEFTMOUSE:   /* mouse keys */
+	case K_LEFTMOUSE:   // mouse keys
 	case K_LEFTMOUSE_NM:
 	case K_LEFTDRAG:
 	case K_LEFTRELEASE:
@@ -1001,30 +1001,30 @@
 	    ins_mouse(c);
 	    break;
 
-	case K_MOUSEDOWN: /* Default action for scroll wheel up: scroll up */
+	case K_MOUSEDOWN: // Default action for scroll wheel up: scroll up
 	    ins_mousescroll(MSCR_DOWN);
 	    break;
 
-	case K_MOUSEUP:	/* Default action for scroll wheel down: scroll down */
+	case K_MOUSEUP:	// Default action for scroll wheel down: scroll down
 	    ins_mousescroll(MSCR_UP);
 	    break;
 
-	case K_MOUSELEFT: /* Scroll wheel left */
+	case K_MOUSELEFT: // Scroll wheel left
 	    ins_mousescroll(MSCR_LEFT);
 	    break;
 
-	case K_MOUSERIGHT: /* Scroll wheel right */
+	case K_MOUSERIGHT: // Scroll wheel right
 	    ins_mousescroll(MSCR_RIGHT);
 	    break;
 
 	case K_PS:
 	    bracketed_paste(PASTE_INSERT, FALSE, NULL);
 	    if (cmdchar == K_PS)
-		/* invoked from normal mode, bail out */
+		// invoked from normal mode, bail out
 		goto doESCkey;
 	    break;
 	case K_PE:
-	    /* Got K_PE without K_PS, ignore. */
+	    // Got K_PE without K_PS, ignore.
 	    break;
 
 #ifdef FEAT_GUI_TABLINE
@@ -1034,17 +1034,17 @@
 	    break;
 #endif
 
-	case K_IGNORE:	/* Something mapped to nothing */
+	case K_IGNORE:	// Something mapped to nothing
 	    break;
 
-	case K_CURSORHOLD:	/* Didn't type something for a while. */
+	case K_CURSORHOLD:	// Didn't type something for a while.
 	    ins_apply_autocmds(EVENT_CURSORHOLDI);
 	    did_cursorhold = TRUE;
 	    break;
 
 #ifdef FEAT_GUI_MSWIN
-	    /* On MS-Windows ignore <M-F4>, we get it when closing the window
-	     * was cancelled. */
+	    // On MS-Windows ignore <M-F4>, we get it when closing the window
+	    // was cancelled.
 	case K_F4:
 	    if (mod_mask != MOD_MASK_ALT)
 		goto normalchar;
@@ -1061,45 +1061,45 @@
 	    break;
 #endif
 
-	case K_HOME:	/* <Home> */
+	case K_HOME:	// <Home>
 	case K_KHOME:
 	case K_S_HOME:
 	case K_C_HOME:
 	    ins_home(c);
 	    break;
 
-	case K_END:	/* <End> */
+	case K_END:	// <End>
 	case K_KEND:
 	case K_S_END:
 	case K_C_END:
 	    ins_end(c);
 	    break;
 
-	case K_LEFT:	/* <Left> */
+	case K_LEFT:	// <Left>
 	    if (mod_mask & (MOD_MASK_SHIFT|MOD_MASK_CTRL))
 		ins_s_left();
 	    else
 		ins_left();
 	    break;
 
-	case K_S_LEFT:	/* <S-Left> */
+	case K_S_LEFT:	// <S-Left>
 	case K_C_LEFT:
 	    ins_s_left();
 	    break;
 
-	case K_RIGHT:	/* <Right> */
+	case K_RIGHT:	// <Right>
 	    if (mod_mask & (MOD_MASK_SHIFT|MOD_MASK_CTRL))
 		ins_s_right();
 	    else
 		ins_right();
 	    break;
 
-	case K_S_RIGHT:	/* <S-Right> */
+	case K_S_RIGHT:	// <S-Right>
 	case K_C_RIGHT:
 	    ins_s_right();
 	    break;
 
-	case K_UP:	/* <Up> */
+	case K_UP:	// <Up>
 	    if (pum_visible())
 		goto docomplete;
 	    if (mod_mask & MOD_MASK_SHIFT)
@@ -1108,7 +1108,7 @@
 		ins_up(FALSE);
 	    break;
 
-	case K_S_UP:	/* <S-Up> */
+	case K_S_UP:	// <S-Up>
 	case K_PAGEUP:
 	case K_KPAGEUP:
 	    if (pum_visible())
@@ -1116,7 +1116,7 @@
 	    ins_pageup();
 	    break;
 
-	case K_DOWN:	/* <Down> */
+	case K_DOWN:	// <Down>
 	    if (pum_visible())
 		goto docomplete;
 	    if (mod_mask & MOD_MASK_SHIFT)
@@ -1125,7 +1125,7 @@
 		ins_down(FALSE);
 	    break;
 
-	case K_S_DOWN:	/* <S-Down> */
+	case K_S_DOWN:	// <S-Down>
 	case K_PAGEDOWN:
 	case K_KPAGEDOWN:
 	    if (pum_visible())
@@ -1134,39 +1134,39 @@
 	    break;
 
 #ifdef FEAT_DND
-	case K_DROP:	/* drag-n-drop event */
+	case K_DROP:	// drag-n-drop event
 	    ins_drop();
 	    break;
 #endif
 
-	case K_S_TAB:	/* When not mapped, use like a normal TAB */
+	case K_S_TAB:	// When not mapped, use like a normal TAB
 	    c = TAB;
-	    /* FALLTHROUGH */
+	    // FALLTHROUGH
 
-	case TAB:	/* TAB or Complete patterns along path */
+	case TAB:	// TAB or Complete patterns along path
 #if defined(FEAT_FIND_ID)
 	    if (ctrl_x_mode_path_patterns())
 		goto docomplete;
 #endif
 	    inserted_space = FALSE;
 	    if (ins_tab())
-		goto normalchar;	/* insert TAB as a normal char */
+		goto normalchar;	// insert TAB as a normal char
 	    auto_format(FALSE, TRUE);
 	    break;
 
-	case K_KENTER:	/* <Enter> */
+	case K_KENTER:	// <Enter>
 	    c = CAR;
-	    /* FALLTHROUGH */
+	    // FALLTHROUGH
 	case CAR:
 	case NL:
 #if defined(FEAT_QUICKFIX)
-	    /* In a quickfix window a <CR> jumps to the error under the
-	     * cursor. */
+	    // In a quickfix window a <CR> jumps to the error under the
+	    // cursor.
 	    if (bt_quickfix(curbuf) && c == CAR)
 	    {
-		if (curwin->w_llist_ref == NULL)    /* quickfix window */
+		if (curwin->w_llist_ref == NULL)    // quickfix window
 		    do_cmdline_cmd((char_u *)".cc");
-		else				    /* location list window */
+		else				    // location list window
 		    do_cmdline_cmd((char_u *)".ll");
 		break;
 	    }
@@ -1174,7 +1174,7 @@
 #ifdef FEAT_CMDWIN
 	    if (cmdwin_type != 0)
 	    {
-		/* Execute the command in the cmdline window. */
+		// Execute the command in the cmdline window.
 		cmdwin_result = CAR;
 		goto doESCkey;
 	    }
@@ -1191,12 +1191,12 @@
 	    }
 #endif
 	    if (ins_eol(c) == FAIL && !p_im)
-		goto doESCkey;	    /* out of memory */
+		goto doESCkey;	    // out of memory
 	    auto_format(FALSE, FALSE);
 	    inserted_space = FALSE;
 	    break;
 
-	case Ctrl_K:	    /* digraph or keyword completion */
+	case Ctrl_K:	    // digraph or keyword completion
 	    if (ctrl_x_mode_dictionary())
 	    {
 		if (has_compl_option(TRUE))
@@ -1210,30 +1210,30 @@
 #endif
 	    goto normalchar;
 
-	case Ctrl_X:	/* Enter CTRL-X mode */
+	case Ctrl_X:	// Enter CTRL-X mode
 	    ins_ctrl_x();
 	    break;
 
-	case Ctrl_RSB:	/* Tag name completion after ^X */
+	case Ctrl_RSB:	// Tag name completion after ^X
 	    if (!ctrl_x_mode_tags())
 		goto normalchar;
 	    goto docomplete;
 
-	case Ctrl_F:	/* File name completion after ^X */
+	case Ctrl_F:	// File name completion after ^X
 	    if (!ctrl_x_mode_files())
 		goto normalchar;
 	    goto docomplete;
 
-	case 's':	/* Spelling completion after ^X */
+	case 's':	// Spelling completion after ^X
 	case Ctrl_S:
 	    if (!ctrl_x_mode_spell())
 		goto normalchar;
 	    goto docomplete;
 
-	case Ctrl_L:	/* Whole line completion after ^X */
+	case Ctrl_L:	// Whole line completion after ^X
 	    if (!ctrl_x_mode_whole_line())
 	    {
-		/* CTRL-L with 'insertmode' set: Leave Insert mode */
+		// CTRL-L with 'insertmode' set: Leave Insert mode
 		if (p_im)
 		{
 		    if (echeck_abbr(Ctrl_L + ABBR_OFF))
@@ -1242,12 +1242,12 @@
 		}
 		goto normalchar;
 	    }
-	    /* FALLTHROUGH */
+	    // FALLTHROUGH
 
-	case Ctrl_P:	/* Do previous/next pattern completion */
+	case Ctrl_P:	// Do previous/next pattern completion
 	case Ctrl_N:
-	    /* if 'complete' is empty then plain ^P is no longer special,
-	     * but it is under other ^X modes */
+	    // if 'complete' is empty then plain ^P is no longer special,
+	    // but it is under other ^X modes
 	    if (*curbuf->b_p_cpt == NUL
 		    && (ctrl_x_mode_normal() || ctrl_x_mode_whole_line())
 		    && !(compl_cont_status & CONT_LOCAL))
@@ -1256,7 +1256,7 @@
 docomplete:
 	    compl_busy = TRUE;
 #ifdef FEAT_FOLDING
-	    disable_fold_update++;  /* don't redraw folds here */
+	    disable_fold_update++;  // don't redraw folds here
 #endif
 	    if (ins_complete(c, TRUE) == FAIL)
 		compl_cont_status = 0;
@@ -1266,14 +1266,14 @@
 	    compl_busy = FALSE;
 	    break;
 
-	case Ctrl_Y:	/* copy from previous line or scroll down */
-	case Ctrl_E:	/* copy from next line	   or scroll up */
+	case Ctrl_Y:	// copy from previous line or scroll down
+	case Ctrl_E:	// copy from next line	   or scroll up
 	    c = ins_ctrl_ey(c);
 	    break;
 
 	  default:
 #ifdef UNIX
-	    if (c == intr_char)		/* special interrupt char */
+	    if (c == intr_char)		// special interrupt char
 		goto do_intr;
 #endif
 
@@ -1284,7 +1284,7 @@
 #if defined(FEAT_EVAL)
 	    if (!p_paste)
 	    {
-		/* Trigger InsertCharPre. */
+		// Trigger InsertCharPre.
 		char_u *str = do_insert_char_pre(c);
 		char_u *p;
 
@@ -1292,7 +1292,7 @@
 		{
 		    if (*str != NUL && stop_arrow() != FAIL)
 		    {
-			/* Insert the new value of v:char literally. */
+			// Insert the new value of v:char literally.
 			for (p = str; *p != NUL; MB_PTR_ADV(p))
 			{
 			    c = PTR2CHAR(p);
@@ -1307,14 +1307,14 @@
 		    c = NUL;
 		}
 
-		/* If the new value is already inserted or an empty string
-		 * then don't insert any character. */
+		// If the new value is already inserted or an empty string
+		// then don't insert any character.
 		if (c == NUL)
 		    break;
 	    }
 #endif
 #ifdef FEAT_SMARTINDENT
-	    /* Try to perform smart-indenting. */
+	    // Try to perform smart-indenting.
 	    ins_try_si(c);
 #endif
 
@@ -1330,9 +1330,9 @@
 		    Insstart_blank_vcol = get_nolist_virtcol();
 	    }
 
-	    /* Insert a normal character and check for abbreviations on a
-	     * special character.  Let CTRL-] expand abbreviations without
-	     * inserting it. */
+	    // Insert a normal character and check for abbreviations on a
+	    // special character.  Let CTRL-] expand abbreviations without
+	    // inserting it.
 	    if (vim_iswordc(c) || (!echeck_abbr(
 			// Add ABBR_OFF for characters above 0x100, this is
 			// what check_abbr() expects.
@@ -1349,23 +1349,23 @@
 	    auto_format(FALSE, TRUE);
 
 #ifdef FEAT_FOLDING
-	    /* When inserting a character the cursor line must never be in a
-	     * closed fold. */
+	    // When inserting a character the cursor line must never be in a
+	    // closed fold.
 	    foldOpenCursor();
 #endif
 	    break;
-	}   /* end of switch (c) */
+	}   // end of switch (c)
 
-	/* If typed something may trigger CursorHoldI again. */
+	// If typed something may trigger CursorHoldI again.
 	if (c != K_CURSORHOLD
 #ifdef FEAT_COMPL_FUNC
-		/* but not in CTRL-X mode, a script can't restore the state */
+		// but not in CTRL-X mode, a script can't restore the state
 		&& ctrl_x_mode_normal()
 #endif
 	       )
 	    did_cursorhold = FALSE;
 
-	/* If the cursor was moved we didn't just insert a space */
+	// If the cursor was moved we didn't just insert a space
 	if (arrow_used)
 	    inserted_space = FALSE;
 
@@ -1379,14 +1379,14 @@
 	    if (in_cinkeys(c, ' ', line_is_white))
 	    {
 		if (stop_arrow() == OK)
-		    /* re-indent the current line */
+		    // re-indent the current line
 		    do_c_expr_indent();
 	    }
 	}
-#endif /* FEAT_CINDENT */
+#endif // FEAT_CINDENT
 
-    }	/* for (;;) */
-    /* NOTREACHED */
+    }	// for (;;)
+    // NOTREACHED
 }
 
     int
@@ -1414,8 +1414,8 @@
     if (char_avail())
 	return;
 
-    /* Trigger CursorMoved if the cursor moved.  Not when the popup menu is
-     * visible, the command might delete it. */
+    // Trigger CursorMoved if the cursor moved.  Not when the popup menu is
+    // visible, the command might delete it.
     if (ready && (has_cursormovedI()
 # ifdef FEAT_PROP_POPUP
 		|| popup_visible
@@ -1428,17 +1428,17 @@
 	    && !pum_visible())
     {
 # ifdef FEAT_SYN_HL
-	/* Need to update the screen first, to make sure syntax
-	 * highlighting is correct after making a change (e.g., inserting
-	 * a "(".  The autocommand may also require a redraw, so it's done
-	 * again below, unfortunately. */
+	// Need to update the screen first, to make sure syntax
+	// highlighting is correct after making a change (e.g., inserting
+	// a "(".  The autocommand may also require a redraw, so it's done
+	// again below, unfortunately.
 	if (syntax_present(curwin) && must_redraw)
 	    update_screen(0);
 # endif
 	if (has_cursormovedI())
 	{
-	    /* Make sure curswant is correct, an autocommand may call
-	     * getcurpos(). */
+	    // Make sure curswant is correct, an autocommand may call
+	    // getcurpos().
 	    update_curswant();
 	    ins_apply_autocmds(EVENT_CURSORMOVEDI);
 	}
@@ -1457,7 +1457,7 @@
 	last_cursormoved = curwin->w_cursor;
     }
 
-    /* Trigger TextChangedI if b_changedtick differs. */
+    // Trigger TextChangedI if b_changedtick differs.
     if (ready && has_textchangedI()
 	    && curbuf->b_last_changedtick != CHANGEDTICK(curbuf)
 	    && !pum_visible())
@@ -1475,9 +1475,9 @@
 					(linenr_T)(curwin->w_cursor.lnum + 1));
     }
 
-    /* Trigger TextChangedP if b_changedtick differs. When the popupmenu closes
-     * TextChangedI will need to trigger for backwards compatibility, thus use
-     * different b_last_changedtick* variables. */
+    // Trigger TextChangedP if b_changedtick differs. When the popupmenu closes
+    // TextChangedI will need to trigger for backwards compatibility, thus use
+    // different b_last_changedtick* variables.
     if (ready && has_textchangedP()
 	    && curbuf->b_last_changedtick_pum != CHANGEDTICK(curbuf)
 	    && pum_visible())
@@ -1517,10 +1517,10 @@
     if (must_redraw)
 	update_screen(0);
     else if (clear_cmdline || redraw_cmdline)
-	showmode();		/* clear cmdline and show mode */
+	showmode();		// clear cmdline and show mode
     showruler(FALSE);
     setcursor();
-    emsg_on_display = FALSE;	/* may remove error message now */
+    emsg_on_display = FALSE;	// may remove error message now
 }
 
 /*
@@ -1533,7 +1533,7 @@
     int		did_putchar = FALSE;
     int		prev_mod_mask = mod_mask;
 
-    /* may need to redraw when no more chars available now */
+    // may need to redraw when no more chars available now
     ins_redraw(FALSE);
 
     if (redrawing() && !char_avail())
@@ -1541,7 +1541,7 @@
 	edit_putchar('^', TRUE);
 	did_putchar = TRUE;
     }
-    AppendToRedobuff((char_u *)CTRL_V_STR);	/* CTRL-V */
+    AppendToRedobuff((char_u *)CTRL_V_STR);	// CTRL-V
 
 #ifdef FEAT_CMDL_INFO
     add_to_showcmd_c(Ctrl_V);
@@ -1549,8 +1549,8 @@
 
     c = get_literal();
     if (did_putchar)
-	/* when the line fits in 'columns' the '^' is at the start of the next
-	 * line and will not removed by the redraw */
+	// when the line fits in 'columns' the '^' is at the start of the next
+	// line and will not removed by the redraw
 	edit_unputchar();
 #ifdef FEAT_CMDL_INFO
     clear_showcmd();
@@ -1626,11 +1626,11 @@
  * Used while handling CTRL-K, CTRL-V, etc. in Insert mode.
  */
 static int  pc_status;
-#define PC_STATUS_UNSET	0	/* pc_bytes was not set */
-#define PC_STATUS_RIGHT	1	/* right halve of double-wide char */
-#define PC_STATUS_LEFT	2	/* left halve of double-wide char */
-#define PC_STATUS_SET	3	/* pc_bytes was filled */
-static char_u pc_bytes[MB_MAXBYTES + 1]; /* saved bytes */
+#define PC_STATUS_UNSET	0	// pc_bytes was not set
+#define PC_STATUS_RIGHT	1	// right halve of double-wide char
+#define PC_STATUS_LEFT	2	// left halve of double-wide char
+#define PC_STATUS_SET	3	// pc_bytes was filled
+static char_u pc_bytes[MB_MAXBYTES + 1]; // saved bytes
 static int  pc_attr;
 static int  pc_row;
 static int  pc_col;
@@ -1642,7 +1642,7 @@
 
     if (ScreenLines != NULL)
     {
-	update_topline();	/* just in case w_topline isn't valid */
+	update_topline();	// just in case w_topline isn't valid
 	validate_cursor();
 	if (highlight)
 	    attr = HL_ATTR(HLF_8);
@@ -1675,7 +1675,7 @@
 		pc_status = PC_STATUS_LEFT;
 	}
 
-	/* save the character to be able to put it back */
+	// save the character to be able to put it back
 	if (pc_status == PC_STATUS_UNSET)
 	{
 	    screen_getbytes(pc_row, pc_col, pc_bytes, &pc_attr);
@@ -1737,7 +1737,7 @@
 	coladvance((colnr_T)MAXCOL);
     if (cmdchar_todo == 'I' || curwin->w_cursor.col <= (int)STRLEN(prompt))
 	curwin->w_cursor.col = (int)STRLEN(prompt);
-    /* Make sure the cursor is in a valid position. */
+    // Make sure the cursor is in a valid position.
     check_cursor();
 }
 
@@ -1788,11 +1788,11 @@
     {
 	char_u *p;
 
-	/* If on the last byte of a multi-byte move to the first byte. */
+	// If on the last byte of a multi-byte move to the first byte.
 	p = ml_get_curline();
 	curwin->w_cursor.col -= (*mb_head_off)(p, p + col);
     }
-    curs_columns(FALSE);	    /* recompute w_wrow and w_wcol */
+    curs_columns(FALSE);	    // recompute w_wrow and w_wcol
     if (curwin->w_wcol < curwin->w_width)
     {
 	edit_putchar('$', FALSE);
@@ -1825,11 +1825,11 @@
 {
     int	    i;
 
-    /* find start of trailing white space */
+    // find start of trailing white space
     for (i = (int)STRLEN(line) - 1; i >= 0 && VIM_ISWHITE(line[i]); i--)
     {
 	if (State & REPLACE_FLAG)
-	    replace_join(0);	    /* remove a NUL from the replace stack */
+	    replace_join(0);	    // remove a NUL from the replace stack
     }
     line[i + 1] = NUL;
 }
@@ -1865,15 +1865,15 @@
     {
 	colnr_T ecol = curwin->w_cursor.col + 1;
 
-	/* Make sure the cursor is at the start of a character, but
-	 * skip forward again when going too far back because of a
-	 * composing character. */
+	// Make sure the cursor is at the start of a character, but
+	// skip forward again when going too far back because of a
+	// composing character.
 	mb_adjust_cursor();
 	while (curwin->w_cursor.col < (colnr_T)limit_col)
 	{
 	    int l = utf_ptr2len(ml_get_cursor());
 
-	    if (l == 0)  /* end of line */
+	    if (l == 0)  // end of line
 		break;
 	    curwin->w_cursor.col += l;
 	}
@@ -1916,9 +1916,9 @@
 	++allow_keys;
 #endif
 #ifdef USE_ON_FLY_SCROLL
-    dont_scroll = TRUE;		/* disallow scrolling here */
+    dont_scroll = TRUE;		// disallow scrolling here
 #endif
-    ++no_mapping;		/* don't map the next key hits */
+    ++no_mapping;		// don't map the next key hits
     cc = 0;
     i = 0;
     for (;;)
@@ -1959,25 +1959,25 @@
 	}
 
 	if (cc > 255 && unicode == 0)
-	    cc = 255;		/* limit range to 0-255 */
+	    cc = 255;		// limit range to 0-255
 	nc = 0;
 
-	if (hex)		/* hex: up to two chars */
+	if (hex)		// hex: up to two chars
 	{
 	    if (i >= 2)
 		break;
 	}
-	else if (unicode)	/* Unicode: up to four or eight chars */
+	else if (unicode)	// Unicode: up to four or eight chars
 	{
 	    if ((unicode == 'u' && i >= 4) || (unicode == 'U' && i >= 8))
 		break;
 	}
-	else if (i >= 3)	/* decimal or octal: up to three chars */
+	else if (i >= 3)	// decimal or octal: up to three chars
 	    break;
     }
-    if (i == 0)	    /* no number entered */
+    if (i == 0)	    // no number entered
     {
-	if (nc == K_ZERO)   /* NUL is stored as NL */
+	if (nc == K_ZERO)   // NUL is stored as NL
 	{
 	    cc = '\n';
 	    nc = 0;
@@ -1989,11 +1989,11 @@
 	}
     }
 
-    if (cc == 0)	/* NUL is stored as NL */
+    if (cc == 0)	// NUL is stored as NL
 	cc = '\n';
     if (enc_dbcs && (cc & 0xff) == 0)
-	cc = '?';	/* don't accept an illegal DBCS char, the NUL in the
-			   second byte will cause trouble! */
+	cc = '?';	// don't accept an illegal DBCS char, the NUL in the
+			// second byte will cause trouble!
 
     --no_mapping;
 #ifdef FEAT_GUI
@@ -2002,7 +2002,7 @@
 #endif
     if (nc)
 	vungetc(nc);
-    got_int = FALSE;	    /* CTRL-C typed after CTRL-V is not an interrupt */
+    got_int = FALSE;	    // CTRL-C typed after CTRL-V is not an interrupt
     return cc;
 }
 
@@ -2013,7 +2013,7 @@
 insert_special(
     int	    c,
     int	    allow_modmask,
-    int	    ctrlv)	    /* c was typed after CTRL-V */
+    int	    ctrlv)	    // c was typed after CTRL-V
 {
     char_u  *p;
     int	    len;
@@ -2026,7 +2026,7 @@
      * unless 'allow_modmask' is TRUE.
      */
 #ifdef MACOS_X
-    /* Command-key never produces a normal key */
+    // Command-key never produces a normal key
     if (mod_mask & MOD_MASK_CMD)
 	allow_modmask = TRUE;
 #endif
@@ -2078,9 +2078,9 @@
  */
     void
 insertchar(
-    int		c,			/* character to insert or NUL */
-    int		flags,			/* INSCHAR_FORMAT, etc. */
-    int		second_indent)		/* indent for second line if >= 0 */
+    int		c,			// character to insert or NUL
+    int		flags,			// INSCHAR_FORMAT, etc.
+    int		second_indent)		// indent for second line if >= 0
 {
     int		textwidth;
     char_u	*p;
@@ -2118,8 +2118,8 @@
 				|| Insstart_blank_vcol <= (colnr_T)textwidth
 			    ))))))
     {
-	/* Format with 'formatexpr' when it's set.  Use internal formatting
-	 * when 'formatexpr' isn't set or it returns non-zero. */
+	// Format with 'formatexpr' when it's set.  Use internal formatting
+	// when 'formatexpr' isn't set or it returns non-zero.
 #if defined(FEAT_EVAL)
 	int     do_internal = TRUE;
 	colnr_T virtcol = get_nolist_virtcol()
@@ -2129,8 +2129,8 @@
 		&& (force_format || virtcol > (colnr_T)textwidth))
 	{
 	    do_internal = (fex_format(curwin->w_cursor.lnum, 1L, c) != 0);
-	    /* It may be required to save for undo again, e.g. when setline()
-	     * was called. */
+	    // It may be required to save for undo again, e.g. when setline()
+	    // was called.
 	    ins_need_undo = TRUE;
 	}
 	if (do_internal)
@@ -2138,7 +2138,7 @@
 	    internal_format(textwidth, second_indent, flags, c == NUL, c);
     }
 
-    if (c == NUL)	    /* only formatting was wanted */
+    if (c == NUL)	    // only formatting was wanted
 	return;
 
     // Check whether this character should end a comment.
@@ -2211,7 +2211,7 @@
      * InsertCharPre autocommand could change the input buffer.
      */
 #ifdef USE_ON_FLY_SCROLL
-    dont_scroll = FALSE;		/* allow scrolling here */
+    dont_scroll = FALSE;		// allow scrolling here
 #endif
 
     if (       !ISSPECIAL(c)
@@ -2255,7 +2255,7 @@
 #ifdef FEAT_RIGHTLEFT
 	    c = vgetc();
 	    if (p_hkmap && KeyTyped)
-		c = hkmap(c);		    /* Hebrew mode mapping */
+		c = hkmap(c);		    // Hebrew mode mapping
 	    buf[i++] = c;
 #else
 	    buf[i++] = vgetc();
@@ -2263,8 +2263,8 @@
 	}
 
 #ifdef FEAT_DIGRAPHS
-	do_digraph(-1);			/* clear digraphs */
-	do_digraph(buf[i-1]);		/* may be the start of a digraph */
+	do_digraph(-1);			// clear digraphs
+	do_digraph(buf[i-1]);		// may be the start of a digraph
 #endif
 	buf[i] = NUL;
 	ins_str(buf);
@@ -2314,7 +2314,7 @@
     int		second_indent,
     int		flags,
     int		format_only,
-    int		c) /* character to be inserted (can be NUL) */
+    int		c) // character to be inserted (can be NUL)
 {
     int		cc;
     int		save_char = NUL;
@@ -2329,7 +2329,7 @@
 #ifdef FEAT_LINEBREAK
     int		has_lbr = curwin->w_p_lbr;
 
-    /* make sure win_lbr_chartabsize() counts correctly */
+    // make sure win_lbr_chartabsize() counts correctly
     curwin->w_p_lbr = FALSE;
 #endif
 
@@ -2352,10 +2352,10 @@
      */
     while (!got_int)
     {
-	int	startcol;		/* Cursor column at entry */
-	int	wantcol;		/* column at textwidth border */
-	int	foundcol;		/* column for start of spaces */
-	int	end_foundcol = 0;	/* column for start of word */
+	int	startcol;		// Cursor column at entry
+	int	wantcol;		// column at textwidth border
+	int	foundcol;		// column for start of spaces
+	int	end_foundcol = 0;	// column for start of word
 	colnr_T	len;
 	colnr_T	virtcol;
 	int	orig_col = 0;
@@ -2375,16 +2375,16 @@
 				       && has_format_option(FO_WRAP_COMS))
 	    do_comments = TRUE;
 
-	/* Don't break until after the comment leader */
+	// Don't break until after the comment leader
 	if (do_comments)
 	    leader_len = get_leader_len(ml_get_curline(), NULL, FALSE, TRUE);
 	else
 	    leader_len = 0;
 
-	/* If the line doesn't start with a comment leader, then don't
-	 * start one in a following broken line.  Avoids that a %word
-	 * moved to the start of the next line causes all following lines
-	 * to start with %. */
+	// If the line doesn't start with a comment leader, then don't
+	// start one in a following broken line.  Avoids that a %word
+	// moved to the start of the next line causes all following lines
+	// to start with %.
 	if (leader_len == 0)
 	    no_leader = TRUE;
 	if (!(flags & INSCHAR_FORMAT)
@@ -2395,7 +2395,7 @@
 	if ((startcol = curwin->w_cursor.col) == 0)
 	    break;
 
-	/* find column of textwidth border */
+	// find column of textwidth border
 	coladvance((colnr_T)textwidth);
 	wantcol = curwin->w_cursor.col;
 
@@ -2417,7 +2417,7 @@
 		cc = gchar_cursor();
 	    if (WHITECHAR(cc))
 	    {
-		/* remember position of blank just before text */
+		// remember position of blank just before text
 		end_col = curwin->w_cursor.col;
 
 		// find start of sequence of blanks
@@ -2433,22 +2433,22 @@
 		        wcc++;
 		}
 		if (curwin->w_cursor.col == 0 && WHITECHAR(cc))
-		    break;		/* only spaces in front of text */
+		    break;		// only spaces in front of text
 
 		// Don't break after a period when 'formatoptions' has 'p' and
 		// there are less than two spaces.
 		if (has_format_option(FO_PERIOD_ABBR) && cc == '.' && wcc < 2)
 		    continue;
 
-		/* Don't break until after the comment leader */
+		// Don't break until after the comment leader
 		if (curwin->w_cursor.col < leader_len)
 		    break;
 		if (has_format_option(FO_ONE_LETTER))
 		{
-		    /* do not break after one-letter words */
+		    // do not break after one-letter words
 		    if (curwin->w_cursor.col == 0)
-			break;	/* one-letter word at begin */
-		    /* do not break "#a b" when 'tw' is 2 */
+			break;	// one-letter word at begin
+		    // do not break "#a b" when 'tw' is 2
 		    if (curwin->w_cursor.col <= leader_len)
 			break;
 		    col = curwin->w_cursor.col;
@@ -2456,7 +2456,7 @@
 		    cc = gchar_cursor();
 
 		    if (WHITECHAR(cc))
-			continue;	/* one-letter, continue */
+			continue;	// one-letter, continue
 		    curwin->w_cursor.col = col;
 		}
 
@@ -2469,15 +2469,15 @@
 	    }
 	    else if (cc >= 0x100 && fo_multibyte)
 	    {
-		/* Break after or before a multi-byte character. */
+		// Break after or before a multi-byte character.
 		if (curwin->w_cursor.col != startcol)
 		{
-		    /* Don't break until after the comment leader */
+		    // Don't break until after the comment leader
 		    if (curwin->w_cursor.col < leader_len)
 			break;
 		    col = curwin->w_cursor.col;
 		    inc_cursor();
-		    /* Don't change end_foundcol if already set. */
+		    // Don't change end_foundcol if already set.
 		    if (foundcol != curwin->w_cursor.col)
 		    {
 			foundcol = curwin->w_cursor.col;
@@ -2497,8 +2497,8 @@
 		cc = gchar_cursor();
 
 		if (WHITECHAR(cc))
-		    continue;		/* break with space */
-		/* Don't break until after the comment leader */
+		    continue;		// break with space
+		// Don't break until after the comment leader
 		if (curwin->w_cursor.col < leader_len)
 		    break;
 
@@ -2514,13 +2514,13 @@
 	    dec_cursor();
 	}
 
-	if (foundcol == 0)		/* no spaces, cannot break line */
+	if (foundcol == 0)		// no spaces, cannot break line
 	{
 	    curwin->w_cursor.col = startcol;
 	    break;
 	}
 
-	/* Going to break the line, remove any "$" now. */
+	// Going to break the line, remove any "$" now.
 	undisplay_dollar();
 
 	/*
@@ -2529,7 +2529,7 @@
 	 * over the text instead.
 	 */
 	if (State & VREPLACE_FLAG)
-	    orig_col = startcol;	/* Will start backspacing from here */
+	    orig_col = startcol;	// Will start backspacing from here
 	else
 	    replace_offset = startcol - end_foundcol;
 
@@ -2554,16 +2554,16 @@
 	    saved_text = vim_strsave(ml_get_cursor());
 	    curwin->w_cursor.col = orig_col;
 	    if (saved_text == NULL)
-		break;	/* Can't do it, out of memory */
+		break;	// Can't do it, out of memory
 	    saved_text[startcol] = NUL;
 
-	    /* Backspace over characters that will move to the next line */
+	    // Backspace over characters that will move to the next line
 	    if (!fo_white_par)
 		backspace_until_column(foundcol);
 	}
 	else
 	{
-	    /* put cursor after pos. to break line */
+	    // put cursor after pos. to break line
 	    if (!fo_white_par)
 		curwin->w_cursor.col = foundcol;
 	}
@@ -2606,12 +2606,12 @@
 			int i;
 			int padding = second_indent - leader_len;
 
-			/* We started at the first_line of a numbered list
-			 * that has a comment.  the open_line() function has
-			 * inserted the proper comment leader and positioned
-			 * the cursor at the end of the split line.  Now we
-			 * add the additional whitespace needed after the
-			 * comment leader for the numbered list.  */
+			// We started at the first_line of a numbered list
+			// that has a comment.  the open_line() function has
+			// inserted the proper comment leader and positioned
+			// the cursor at the end of the split line.  Now we
+			// add the additional whitespace needed after the
+			// comment leader for the numbered list.
 			for (i = 0; i < padding; i++)
 			    ins_str((char_u *)" ");
 		    }
@@ -2649,7 +2649,7 @@
 #ifdef FEAT_CINDENT
 	can_cindent = TRUE;
 #endif
-	/* moved the cursor, don't autoindent or cindent now */
+	// moved the cursor, don't autoindent or cindent now
 	did_ai = FALSE;
 #ifdef FEAT_SMARTINDENT
 	did_si = FALSE;
@@ -2659,7 +2659,7 @@
 	line_breakcheck();
     }
 
-    if (save_char != NUL)		/* put back space after cursor */
+    if (save_char != NUL)		// put back space after cursor
 	pchar_cursor(save_char);
 
 #ifdef FEAT_LINEBREAK
@@ -2681,8 +2681,8 @@
  */
     void
 auto_format(
-    int		trailblank,	/* when TRUE also format with trailing blank */
-    int		prev_line)	/* may start in previous line */
+    int		trailblank,	// when TRUE also format with trailing blank
+    int		prev_line)	// may start in previous line
 {
     pos_T	pos;
     colnr_T	len;
@@ -2697,14 +2697,14 @@
     pos = curwin->w_cursor;
     old = ml_get_curline();
 
-    /* may remove added space */
+    // may remove added space
     check_auto_format(FALSE);
 
-    /* Don't format in Insert mode when the cursor is on a trailing blank, the
-     * user might insert normal text next.  Also skip formatting when "1" is
-     * in 'formatoptions' and there is a single character before the cursor.
-     * Otherwise the line would be broken and when typing another non-white
-     * next they are not joined back together. */
+    // Don't format in Insert mode when the cursor is on a trailing blank, the
+    // user might insert normal text next.  Also skip formatting when "1" is
+    // in 'formatoptions' and there is a single character before the cursor.
+    // Otherwise the line would be broken and when typing another non-white
+    // next they are not joined back together.
     wasatend = (pos.col == (colnr_T)STRLEN(old));
     if (*old != NUL && !trailblank && wasatend)
     {
@@ -2722,8 +2722,8 @@
 	curwin->w_cursor = pos;
     }
 
-    /* With the 'c' flag in 'formatoptions' and 't' missing: only format
-     * comments. */
+    // With the 'c' flag in 'formatoptions' and 't' missing: only format
+    // comments.
     if (has_format_option(FO_WRAP_COMS) && !has_format_option(FO_WRAP)
 				&& get_leader_len(old, NULL, FALSE, TRUE) == 0)
 	return;
@@ -2751,17 +2751,17 @@
 
     if (curwin->w_cursor.lnum > curbuf->b_ml.ml_line_count)
     {
-	/* "cannot happen" */
+	// "cannot happen"
 	curwin->w_cursor.lnum = curbuf->b_ml.ml_line_count;
 	coladvance((colnr_T)MAXCOL);
     }
     else
 	check_cursor_col();
 
-    /* Insert mode: If the cursor is now after the end of the line while it
-     * previously wasn't, the line was broken.  Because of the rule above we
-     * need to add a space when 'w' is in 'formatoptions' to keep a paragraph
-     * formatted. */
+    // Insert mode: If the cursor is now after the end of the line while it
+    // previously wasn't, the line was broken.  Because of the rule above we
+    // need to add a space when 'w' is in 'formatoptions' to keep a paragraph
+    // formatted.
     if (!wasatend && has_format_option(FO_WHITE_PAR))
     {
 	new = ml_get_curline();
@@ -2772,11 +2772,11 @@
 	    pnew[len] = ' ';
 	    pnew[len + 1] = NUL;
 	    ml_replace(curwin->w_cursor.lnum, pnew, FALSE);
-	    /* remove the space later */
+	    // remove the space later
 	    did_add_space = TRUE;
 	}
 	else
-	    /* may remove added space */
+	    // may remove added space
 	    check_auto_format(FALSE);
     }
 
@@ -2790,7 +2790,7 @@
  */
     static void
 check_auto_format(
-    int		end_insert)	    /* TRUE when ending Insert mode */
+    int		end_insert)	    // TRUE when ending Insert mode
 {
     int		c = ' ';
     int		cc;
@@ -2799,7 +2799,7 @@
     {
 	cc = gchar_cursor();
 	if (!WHITECHAR(cc))
-	    /* Somehow the space was removed already. */
+	    // Somehow the space was removed already.
 	    did_add_space = FALSE;
 	else
 	{
@@ -2811,7 +2811,7 @@
 	    }
 	    if (c != NUL)
 	    {
-		/* The space is no longer at the end of the line, delete it. */
+		// The space is no longer at the end of the line, delete it.
 		del_char(FALSE);
 		did_add_space = FALSE;
 	    }
@@ -2828,15 +2828,15 @@
  */
     int
 comp_textwidth(
-    int		ff)	/* force formatting (for "gq" command) */
+    int		ff)	// force formatting (for "gq" command)
 {
     int		textwidth;
 
     textwidth = curbuf->b_p_tw;
     if (textwidth == 0 && curbuf->b_p_wm)
     {
-	/* The width is the window width minus 'wrapmargin' minus all the
-	 * things that add to the margin. */
+	// The width is the window width minus 'wrapmargin' minus all the
+	// things that add to the margin.
 	textwidth = curwin->w_width - curbuf->b_p_wm;
 #ifdef FEAT_CMDWIN
 	if (cmdwin_type != 0)
@@ -2871,8 +2871,8 @@
 {
     char_u	buf[10];
 
-    /* Only digits need special treatment.  Translate them into a string of
-     * three digits. */
+    // Only digits need special treatment.  Translate them into a string of
+    // three digits.
     if (VIM_ISDIGIT(c))
     {
 	vim_snprintf((char *)buf, sizeof(buf), "%03d", c);
@@ -2888,7 +2888,7 @@
  */
     void
 start_arrow(
-    pos_T    *end_insert_pos)		/* can be NULL */
+    pos_T    *end_insert_pos)		// can be NULL
 {
     start_arrow_common(end_insert_pos, TRUE);
 }
@@ -2899,8 +2899,8 @@
  */
     static void
 start_arrow_with_change(
-    pos_T    *end_insert_pos,		/* can be NULL */
-    int	      end_change)		/* end undoable change */
+    pos_T    *end_insert_pos,		// can be NULL
+    int	      end_change)		// end undoable change
 {
     start_arrow_common(end_insert_pos, end_change);
     if (!end_change)
@@ -2912,14 +2912,14 @@
 
     static void
 start_arrow_common(
-    pos_T    *end_insert_pos,		/* can be NULL */
-    int	      end_change)		/* end undoable change */
+    pos_T    *end_insert_pos,		// can be NULL
+    int	      end_change)		// end undoable change
 {
-    if (!arrow_used && end_change)	/* something has been inserted */
+    if (!arrow_used && end_change)	// something has been inserted
     {
 	AppendToRedobuff(ESC_STR);
 	stop_insert(end_insert_pos, FALSE, FALSE);
-	arrow_used = TRUE;	/* this means we stopped the current insert */
+	arrow_used = TRUE;	// this means we stopped the current insert
     }
 #ifdef FEAT_SPELL
     check_spell_redraw();
@@ -2955,10 +2955,10 @@
 {
     if (arrow_used)
     {
-	Insstart = curwin->w_cursor;	/* new insertion starts here */
+	Insstart = curwin->w_cursor;	// new insertion starts here
 	if (Insstart.col > Insstart_orig.col && !ins_need_undo)
-	    /* Don't update the original insert position when moved to the
-	     * right, except when nothing was inserted yet. */
+	    // Don't update the original insert position when moved to the
+	    // right, except when nothing was inserted yet.
 	    update_Insstart_orig = FALSE;
 	Insstart_textlen = (colnr_T)linetabsize(ml_get_curline());
 
@@ -2975,7 +2975,7 @@
 	    vr_lines_changed = 1;
 	}
 	ResetRedobuff();
-	AppendToRedobuff((char_u *)"1i");   /* pretend we start an insertion */
+	AppendToRedobuff((char_u *)"1i");   // pretend we start an insertion
 	new_insert_skip = 2;
     }
     else if (ins_need_undo)
@@ -2985,7 +2985,7 @@
     }
 
 #ifdef FEAT_FOLDING
-    /* Always open fold at the cursor line when inserting something. */
+    // Always open fold at the cursor line when inserting something.
     foldOpenCursor();
 #endif
 
@@ -3000,14 +3000,14 @@
     static void
 stop_insert(
     pos_T	*end_insert_pos,
-    int		esc,			/* called by ins_esc() */
-    int		nomove)			/* <c-\><c-o>, don't move cursor */
+    int		esc,			// called by ins_esc()
+    int		nomove)			// <c-\><c-o>, don't move cursor
 {
     int		cc;
     char_u	*ptr;
 
     stop_redo_ins();
-    replace_flush();		/* abandon replace stack */
+    replace_flush();		// abandon replace stack
 
     /*
      * Save the inserted text for later redo with ^@ and CTRL-A.
@@ -3027,17 +3027,17 @@
 
     if (!arrow_used && end_insert_pos != NULL)
     {
-	/* Auto-format now.  It may seem strange to do this when stopping an
-	 * insertion (or moving the cursor), but it's required when appending
-	 * a line and having it end in a space.  But only do it when something
-	 * was actually inserted, otherwise undo won't work. */
+	// Auto-format now.  It may seem strange to do this when stopping an
+	// insertion (or moving the cursor), but it's required when appending
+	// a line and having it end in a space.  But only do it when something
+	// was actually inserted, otherwise undo won't work.
 	if (!ins_need_undo && has_format_option(FO_AUTO))
 	{
 	    pos_T   tpos = curwin->w_cursor;
 
-	    /* When the cursor is at the end of the line after a space the
-	     * formatting will move it to the following word.  Avoid that by
-	     * moving the cursor onto the space. */
+	    // When the cursor is at the end of the line after a space the
+	    // formatting will move it to the following word.  Avoid that by
+	    // moving the cursor onto the space.
 	    cc = 'x';
 	    if (curwin->w_cursor.col > 0 && gchar_cursor() == NUL)
 	    {
@@ -3062,14 +3062,14 @@
 	    }
 	}
 
-	/* If a space was inserted for auto-formatting, remove it now. */
+	// If a space was inserted for auto-formatting, remove it now.
 	check_auto_format(TRUE);
 
-	/* If we just did an auto-indent, remove the white space from the end
-	 * of the line, and put the cursor back.
-	 * Do this when ESC was used or moving the cursor up/down.
-	 * Check for the old position still being valid, just in case the text
-	 * got changed unexpectedly. */
+	// If we just did an auto-indent, remove the white space from the end
+	// of the line, and put the cursor back.
+	// Do this when ESC was used or moving the cursor up/down.
+	// Check for the old position still being valid, just in case the text
+	// got changed unexpectedly.
 	if (!nomove && did_ai && (esc || (vim_strchr(p_cpo, CPO_INDENT) == NULL
 			&& curwin->w_cursor.lnum != end_insert_pos->lnum))
 		&& end_insert_pos->lnum <= curbuf->b_ml.ml_line_count)
@@ -3077,7 +3077,7 @@
 	    pos_T	tpos = curwin->w_cursor;
 
 	    curwin->w_cursor = *end_insert_pos;
-	    check_cursor_col();  /* make sure it is not past the line */
+	    check_cursor_col();  // make sure it is not past the line
 	    for (;;)
 	    {
 		if (gchar_cursor() == NUL && curwin->w_cursor.col > 0)
@@ -3086,21 +3086,21 @@
 		if (!VIM_ISWHITE(cc))
 		    break;
 		if (del_char(TRUE) == FAIL)
-		    break;  /* should not happen */
+		    break;  // should not happen
 	    }
 	    if (curwin->w_cursor.lnum != tpos.lnum)
 		curwin->w_cursor = tpos;
 	    else
 	    {
-		/* reset tpos, could have been invalidated in the loop above */
+		// reset tpos, could have been invalidated in the loop above
 		tpos = curwin->w_cursor;
 		tpos.col++;
 		if (cc != NUL && gchar_pos(&tpos) == NUL)
-		    ++curwin->w_cursor.col;	/* put cursor back on the NUL */
+		    ++curwin->w_cursor.col;	// put cursor back on the NUL
 	    }
 
-	    /* <C-S-Right> may have started Visual mode, adjust the position for
-	     * deleted characters. */
+	    // <C-S-Right> may have started Visual mode, adjust the position for
+	    // deleted characters.
 	    if (VIsual_active && VIsual.lnum == curwin->w_cursor.lnum)
 	    {
 		int len = (int)STRLEN(ml_get_curline());
@@ -3120,8 +3120,8 @@
     can_si_back = FALSE;
 #endif
 
-    /* Set '[ and '] to the inserted text.  When end_insert_pos is NULL we are
-     * now in a different buffer. */
+    // Set '[ and '] to the inserted text.  When end_insert_pos is NULL we are
+    // now in a different buffer.
     if (end_insert_pos != NULL)
     {
 	curbuf->b_op_start = Insstart;
@@ -3144,7 +3144,7 @@
     if (last_insert != NULL)
     {
 	s = last_insert;
-	/* Use the CTRL-V only when entering a special char */
+	// Use the CTRL-V only when entering a special char
 	if (c < ' ' || c == DEL)
 	    *s++ = Ctrl_V;
 	s = add_char2buf(c, s);
@@ -3178,7 +3178,7 @@
     for (i = 0; i < len; ++i)
     {
 	c = temp[i];
-	/* Need to escape K_SPECIAL and CSI like in the typeahead buffer. */
+	// Need to escape K_SPECIAL and CSI like in the typeahead buffer.
 	if (c == K_SPECIAL)
 	{
 	    *s++ = K_SPECIAL;
@@ -3246,28 +3246,28 @@
     {
 	pos_T	prevpos = curwin->w_cursor;
 
-	/* Adjust for multi-wide char (excluding TAB) */
+	// Adjust for multi-wide char (excluding TAB)
 	ptr = ml_get_cursor();
 	coladvance(getviscol() + ((*ptr != TAB
 					  && vim_isprintc((*mb_ptr2char)(ptr)))
 		    ? ptr2cells(ptr) : 1));
 	curwin->w_set_curswant = TRUE;
-	/* Return OK if the cursor moved, FAIL otherwise (at window edge). */
+	// Return OK if the cursor moved, FAIL otherwise (at window edge).
 	return (prevpos.col != curwin->w_cursor.col
 		    || prevpos.coladd != curwin->w_cursor.coladd) ? OK : FAIL;
     }
 
     ptr = ml_get_cursor();
     if (*ptr == NUL)
-	return FAIL;	    /* already at the very end */
+	return FAIL;	    // already at the very end
 
     if (has_mbyte)
 	l = (*mb_ptr2len)(ptr);
     else
 	l = 1;
 
-    /* move "l" bytes right, but don't end up on the NUL, unless 'virtualedit'
-     * contains "onemore". */
+    // move "l" bytes right, but don't end up on the NUL, unless 'virtualedit'
+    // contains "onemore".
     if (ptr[l] == NUL && (ve_flags & VE_ONEMORE) == 0)
 	return FAIL;
     curwin->w_cursor.col += l;
@@ -3290,14 +3290,14 @@
 	    return FAIL;
 
 #ifdef FEAT_LINEBREAK
-	/* We might get stuck on 'showbreak', skip over it. */
+	// We might get stuck on 'showbreak', skip over it.
 	width = 1;
 	for (;;)
 	{
 	    coladvance(v - width);
-	    /* getviscol() is slow, skip it when 'showbreak' is empty,
-	     * 'breakindent' is not set and there are no multi-byte
-	     * characters */
+	    // getviscol() is slow, skip it when 'showbreak' is empty,
+	    // 'breakindent' is not set and there are no multi-byte
+	    // characters
 	    if ((*get_showbreak_value(curwin) == NUL && !curwin->w_p_bri
 					     && !has_mbyte) || getviscol() < v)
 		break;
@@ -3311,7 +3311,7 @@
 	{
 	    char_u *ptr;
 
-	    /* Adjust for multi-wide char (not a TAB) */
+	    // Adjust for multi-wide char (not a TAB)
 	    ptr = ml_get_cursor();
 	    if (*ptr != TAB && vim_isprintc((*mb_ptr2char)(ptr))
 							 && ptr2cells(ptr) > 1)
@@ -3328,8 +3328,8 @@
     curwin->w_set_curswant = TRUE;
     --curwin->w_cursor.col;
 
-    /* if the character on the left of the current cursor is a multi-byte
-     * character, move to its first byte */
+    // if the character on the left of the current cursor is a multi-byte
+    // character, move to its first byte
     if (has_mbyte)
 	mb_adjust_cursor();
     return OK;
@@ -3338,15 +3338,15 @@
     int
 cursor_up(
     long	n,
-    int		upd_topline)	    /* When TRUE: update topline */
+    int		upd_topline)	    // When TRUE: update topline
 {
     linenr_T	lnum;
 
     if (n > 0)
     {
 	lnum = curwin->w_cursor.lnum;
-	/* This fails if the cursor is already in the first line or the count
-	 * is larger than the line number and '-' is in 'cpoptions' */
+	// This fails if the cursor is already in the first line or the count
+	// is larger than the line number and '-' is in 'cpoptions'
 	if (lnum <= 1 || (n >= lnum && vim_strchr(p_cpo, CPO_MINUS) != NULL))
 	    return FAIL;
 	if (n >= lnum)
@@ -3358,18 +3358,18 @@
 	    /*
 	     * Count each sequence of folded lines as one logical line.
 	     */
-	    /* go to the start of the current fold */
+	    // go to the start of the current fold
 	    (void)hasFolding(lnum, &lnum, NULL);
 
 	    while (n--)
 	    {
-		/* move up one line */
+		// move up one line
 		--lnum;
 		if (lnum <= 1)
 		    break;
-		/* If we entered a fold, move to the beginning, unless in
-		 * Insert mode or when 'foldopen' contains "all": it will open
-		 * in a moment. */
+		// If we entered a fold, move to the beginning, unless in
+		// Insert mode or when 'foldopen' contains "all": it will open
+		// in a moment.
 		if (n > 0 || !((State & INSERT) || (fdo_flags & FDO_ALL)))
 		    (void)hasFolding(lnum, &lnum, NULL);
 	    }
@@ -3382,11 +3382,11 @@
 	curwin->w_cursor.lnum = lnum;
     }
 
-    /* try to advance to the column we want to be at */
+    // try to advance to the column we want to be at
     coladvance(curwin->w_curswant);
 
     if (upd_topline)
-	update_topline();	/* make sure curwin->w_topline is valid */
+	update_topline();	// make sure curwin->w_topline is valid
 
     return OK;
 }
@@ -3397,7 +3397,7 @@
     int
 cursor_down(
     long	n,
-    int		upd_topline)	    /* When TRUE: update topline */
+    int		upd_topline)	    // When TRUE: update topline
 {
     linenr_T	lnum;
 
@@ -3405,11 +3405,11 @@
     {
 	lnum = curwin->w_cursor.lnum;
 #ifdef FEAT_FOLDING
-	/* Move to last line of fold, will fail if it's the end-of-file. */
+	// Move to last line of fold, will fail if it's the end-of-file.
 	(void)hasFolding(lnum, NULL, &lnum);
 #endif
-	/* This fails if the cursor is already in the last line or would move
-	 * beyond the last line and '-' is in 'cpoptions' */
+	// This fails if the cursor is already in the last line or would move
+	// beyond the last line and '-' is in 'cpoptions'
 	if (lnum >= curbuf->b_ml.ml_line_count
 		|| (lnum + n > curbuf->b_ml.ml_line_count
 		    && vim_strchr(p_cpo, CPO_MINUS) != NULL))
@@ -3422,7 +3422,7 @@
 	{
 	    linenr_T	last;
 
-	    /* count each sequence of folded lines as one logical line */
+	    // count each sequence of folded lines as one logical line
 	    while (n--)
 	    {
 		if (hasFolding(lnum, NULL, &last))
@@ -3441,11 +3441,11 @@
 	curwin->w_cursor.lnum = lnum;
     }
 
-    /* try to advance to the column we want to be at */
+    // try to advance to the column we want to be at
     coladvance(curwin->w_curswant);
 
     if (upd_topline)
-	update_topline();	/* make sure curwin->w_topline is valid */
+	update_topline();	// make sure curwin->w_topline is valid
 
     return OK;
 }
@@ -3457,9 +3457,9 @@
  */
     int
 stuff_inserted(
-    int	    c,		/* Command character to be inserted */
-    long    count,	/* Repeat this many times */
-    int	    no_esc)	/* Don't add an ESC at the end */
+    int	    c,		// Command character to be inserted
+    long    count,	// Repeat this many times
+    int	    no_esc)	// Don't add an ESC at the end
 {
     char_u	*esc_ptr;
     char_u	*ptr;
@@ -3473,16 +3473,15 @@
 	return FAIL;
     }
 
-    /* may want to stuff the command character, to start Insert mode */
+    // may want to stuff the command character, to start Insert mode
     if (c != NUL)
 	stuffcharReadbuff(c);
     if ((esc_ptr = (char_u *)vim_strrchr(ptr, ESC)) != NULL)
-	*esc_ptr = NUL;	    /* remove the ESC */
+	*esc_ptr = NUL;	    // remove the ESC
 
-    /* when the last char is either "0" or "^" it will be quoted if no ESC
-     * comes after it OR if it will inserted more than once and "ptr"
-     * starts with ^D.	-- Acevedo
-     */
+    // when the last char is either "0" or "^" it will be quoted if no ESC
+    // comes after it OR if it will inserted more than once and "ptr"
+    // starts with ^D.	-- Acevedo
     last_ptr = (esc_ptr ? esc_ptr : ptr + STRLEN(ptr)) - 1;
     if (last_ptr >= ptr && (*last_ptr == '0' || *last_ptr == '^')
 	    && (no_esc || (*ptr == Ctrl_D && count > 1)))
@@ -3494,7 +3493,7 @@
     do
     {
 	stuffReadbuff(ptr);
-	/* a trailing "0" is inserted as "<C-V>048", "^" as "<C-V>^" */
+	// a trailing "0" is inserted as "<C-V>048", "^" as "<C-V>^"
 	if (last)
 	    stuffReadbuff((char_u *)(last == '0'
 			? IF_EB("\026\060\064\070", CTRL_V_STR "xf0")
@@ -3506,9 +3505,9 @@
 	*last_ptr = last;
 
     if (esc_ptr != NULL)
-	*esc_ptr = ESC;	    /* put the ESC back */
+	*esc_ptr = ESC;	    // put the ESC back
 
-    /* may want to stuff a trailing ESC, to get out of Insert mode */
+    // may want to stuff a trailing ESC, to get out of Insert mode
     if (!no_esc)
 	stuffcharReadbuff(ESC);
 
@@ -3539,7 +3538,7 @@
     if (s != NULL)
     {
 	len = (int)STRLEN(s);
-	if (len > 0 && s[len - 1] == ESC)	/* remove trailing ESC */
+	if (len > 0 && s[len - 1] == ESC)	// remove trailing ESC
 	    s[len - 1] = NUL;
     }
     return s;
@@ -3554,8 +3553,8 @@
     static int
 echeck_abbr(int c)
 {
-    /* Don't check for abbreviation in paste mode, when disabled and just
-     * after moving around with cursor keys. */
+    // Don't check for abbreviation in paste mode, when disabled and just
+    // after moving around with cursor keys.
     if (p_paste || no_abbr || arrow_used)
 	return FALSE;
 
@@ -3583,22 +3582,22 @@
  */
 
 static char_u	*replace_stack = NULL;
-static long	replace_stack_nr = 0;	    /* next entry in replace stack */
-static long	replace_stack_len = 0;	    /* max. number of entries */
+static long	replace_stack_nr = 0;	    // next entry in replace stack
+static long	replace_stack_len = 0;	    // max. number of entries
 
     void
 replace_push(
-    int	    c)	    /* character that is replaced (NUL is none) */
+    int	    c)	    // character that is replaced (NUL is none)
 {
     char_u  *p;
 
-    if (replace_stack_nr < replace_offset)	/* nothing to do */
+    if (replace_stack_nr < replace_offset)	// nothing to do
 	return;
     if (replace_stack_len <= replace_stack_nr)
     {
 	replace_stack_len += 50;
 	p = ALLOC_MULT(char_u, replace_stack_len);
-	if (p == NULL)	    /* out of memory */
+	if (p == NULL)	    // out of memory
 	{
 	    replace_stack_len -= 50;
 	    return;
@@ -3653,7 +3652,7 @@
  */
     void
 replace_join(
-    int	    off)	/* offset for which NUL to remove */
+    int	    off)	// offset for which NUL to remove
 {
     int	    i;
 
@@ -3677,7 +3676,7 @@
     int	    cc;
     int	    oldState = State;
 
-    State = NORMAL;			/* don't want REPLACE here */
+    State = NORMAL;			// don't want REPLACE here
     while ((cc = replace_pop()) > 0)
     {
 	mb_replace_pop_ins(cc);
@@ -3709,15 +3708,15 @@
 	ins_char(cc);
 
     if (enc_utf8)
-	/* Handle composing chars. */
+	// Handle composing chars.
 	for (;;)
 	{
 	    c = replace_pop();
-	    if (c == -1)	    /* stack empty */
+	    if (c == -1)	    // stack empty
 		break;
 	    if ((n = MB_BYTE2LEN(c)) == 1)
 	    {
-		/* Not a multi-byte char, put it back. */
+		// Not a multi-byte char, put it back.
 		replace_push(c);
 		break;
 	    }
@@ -3730,7 +3729,7 @@
 		    ins_bytes_len(buf, n);
 		else
 		{
-		    /* Not a composing char, put it back. */
+		    // Not a composing char, put it back.
 		    for (i = n - 1; i >= 0; --i)
 			replace_push(buf[i]);
 		    break;
@@ -3788,8 +3787,8 @@
 #endif
 	if (State & VREPLACE_FLAG)
 	{
-	    /* Get the number of screen cells used by the character we are
-	     * going to delete. */
+	    // Get the number of screen cells used by the character we are
+	    // going to delete.
 	    getvcol(curwin, &curwin->w_cursor, NULL, &start_vcol, NULL);
 	    orig_vcols = chartabsize(ml_get_cursor(), start_vcol);
 	}
@@ -3810,7 +3809,7 @@
 
 	if (State & VREPLACE_FLAG)
 	{
-	    /* Get the number of screen cells used by the inserted characters */
+	    // Get the number of screen cells used by the inserted characters
 	    p = ml_get_cursor();
 	    ins_len = (int)STRLEN(p) - orig_len;
 	    vcol = start_vcol;
@@ -3821,8 +3820,8 @@
 	    }
 	    vcol -= start_vcol;
 
-	    /* Delete spaces that were inserted after the cursor to keep the
-	     * text aligned. */
+	    // Delete spaces that were inserted after the cursor to keep the
+	    // text aligned.
 	    curwin->w_cursor.col += ins_len;
 	    while (vcol > orig_vcols && gchar_cursor() == ' ')
 	    {
@@ -3857,7 +3856,7 @@
     int
 hkmap(int c)
 {
-    if (p_hkmapp)   /* phonetic mapping, by Ilya Dogolazky */
+    if (p_hkmapp)   // phonetic mapping, by Ilya Dogolazky
     {
 	enum {hALEF=0, BET, GIMEL, DALET, HEI, VAV, ZAIN, HET, TET, IUD,
 	    KAFsofit, hKAF, LAMED, MEMsofit, MEM, NUNsofit, NUN, SAMEH, AIN,
@@ -3875,25 +3874,24 @@
 
 	if (c == 'N' || c == 'M' || c == 'P' || c == 'C' || c == 'Z')
 	    return (int)(map[CharOrd(c)] - 1 + p_aleph);
-							    /* '-1'='sofit' */
+							    // '-1'='sofit'
 	else if (c == 'x')
 	    return 'X';
 	else if (c == 'q')
-	    return '\''; /* {geresh}={'} */
+	    return '\''; // {geresh}={'}
 	else if (c == 246)
-	    return ' ';  /* \"o --> ' ' for a german keyboard */
+	    return ' ';  // \"o --> ' ' for a german keyboard
 	else if (c == 228)
-	    return ' ';  /* \"a --> ' '      -- / --	       */
+	    return ' ';  // \"a --> ' '      -- / --
 	else if (c == 252)
-	    return ' ';  /* \"u --> ' '      -- / --	       */
+	    return ' ';  // \"u --> ' '      -- / --
 #ifdef EBCDIC
 	else if (islower(c))
 #else
-	/* NOTE: islower() does not do the right thing for us on Linux so we
-	 * do this the same was as 5.7 and previous, so it works correctly on
-	 * all systems.  Specifically, the e.g. Delete and Arrow keys are
-	 * munged and won't work if e.g. searching for Hebrew text.
-	 */
+	// NOTE: islower() does not do the right thing for us on Linux so we
+	// do this the same was as 5.7 and previous, so it works correctly on
+	// all systems.  Specifically, the e.g. Delete and Arrow keys are
+	// munged and won't work if e.g. searching for Hebrew text.
 	else if (c >= 'a' && c <= 'z')
 #endif
 	    return (int)(map[CharOrdLow(c)] + p_aleph);
@@ -3910,7 +3908,7 @@
 	    case 'q':	return '/';
 	    case 'w':	return '\'';
 
-			/* Hebrew letters - set offset from 'a' */
+			// Hebrew letters - set offset from 'a'
 	    case ',':	c = '{'; break;
 	    case '.':	c = 'v'; break;
 	    case ';':	c = 't'; break;
@@ -3918,7 +3916,7 @@
 			 static char str[] = "zqbcxlsjphmkwonu ydafe rig";
 
 #ifdef EBCDIC
-			 /* see note about islower() above */
+			 // see note about islower() above
 			 if (!islower(c))
 #else
 			 if (c < 'a' || c > 'z')
@@ -3948,7 +3946,7 @@
     pc_status = PC_STATUS_UNSET;
     if (redrawing() && !char_avail())
     {
-	/* may need to redraw when no more chars available now */
+	// may need to redraw when no more chars available now
 	ins_redraw(FALSE);
 
 	edit_putchar('"', TRUE);
@@ -3958,7 +3956,7 @@
     }
 
 #ifdef USE_ON_FLY_SCROLL
-    dont_scroll = TRUE;		/* disallow scrolling here */
+    dont_scroll = TRUE;		// disallow scrolling here
 #endif
 
     /*
@@ -3971,7 +3969,7 @@
     LANGMAP_ADJUST(regname, TRUE);
     if (regname == Ctrl_R || regname == Ctrl_O || regname == Ctrl_P)
     {
-	/* Get a third key for literal register insertion */
+	// Get a third key for literal register insertion
 	literally = regname;
 #ifdef FEAT_CMDL_INFO
 	add_to_showcmd_c(literally);
@@ -3983,8 +3981,8 @@
     --allow_keys;
 
 #ifdef FEAT_EVAL
-    /* Don't call u_sync() while typing the expression or giving an error
-     * message for it. Only call it explicitly. */
+    // Don't call u_sync() while typing the expression or giving an error
+    // message for it. Only call it explicitly.
     ++no_u_sync;
     if (regname == '=')
     {
@@ -3992,8 +3990,8 @@
 # ifdef HAVE_INPUT_METHOD
 	int	im_on = im_get_status();
 # endif
-	/* Sync undo when evaluating the expression calls setline() or
-	 * append(), so that it can be undone separately. */
+	// Sync undo when evaluating the expression calls setline() or
+	// append(), so that it can be undone separately.
 	u_sync_once = 2;
 
 	regname = get_expr_register();
@@ -4010,14 +4008,14 @@
     if (regname == NUL || !valid_yank_reg(regname, FALSE))
     {
 	vim_beep(BO_REG);
-	need_redraw = TRUE;	/* remove the '"' */
+	need_redraw = TRUE;	// remove the '"'
     }
     else
     {
 #endif
 	if (literally == Ctrl_O || literally == Ctrl_P)
 	{
-	    /* Append the command to the redo buffer. */
+	    // Append the command to the redo buffer.
 	    AppendCharToRedobuff(Ctrl_R);
 	    AppendCharToRedobuff(literally);
 	    AppendCharToRedobuff(regname);
@@ -4028,12 +4026,12 @@
 	else if (insert_reg(regname, literally) == FAIL)
 	{
 	    vim_beep(BO_REG);
-	    need_redraw = TRUE;	/* remove the '"' */
+	    need_redraw = TRUE;	// remove the '"'
 	}
 	else if (stop_insert_mode)
-	    /* When the '=' register was used and a function was invoked that
-	     * did ":stopinsert" then stuff_empty() returns FALSE but we won't
-	     * insert anything, need to remove the '"' */
+	    // When the '=' register was used and a function was invoked that
+	    // did ":stopinsert" then stuff_empty() returns FALSE but we won't
+	    // insert anything, need to remove the '"'
 	    need_redraw = TRUE;
 
 #ifdef FEAT_EVAL
@@ -4047,11 +4045,11 @@
     clear_showcmd();
 #endif
 
-    /* If the inserted register is empty, we need to remove the '"' */
+    // If the inserted register is empty, we need to remove the '"'
     if (need_redraw || stuff_empty())
 	edit_unputchar();
 
-    /* Disallow starting Visual mode here, would get a weird mode. */
+    // Disallow starting Visual mode here, would get a weird mode.
     if (!vis_active && VIsual_active)
 	end_visual_mode();
 }
@@ -4078,36 +4076,36 @@
     --allow_keys;
     switch (c)
     {
-	/* CTRL-G k and CTRL-G <Up>: cursor up to Insstart.col */
+	// CTRL-G k and CTRL-G <Up>: cursor up to Insstart.col
 	case K_UP:
 	case Ctrl_K:
 	case 'k': ins_up(TRUE);
 		  break;
 
-	/* CTRL-G j and CTRL-G <Down>: cursor down to Insstart.col */
+	// CTRL-G j and CTRL-G <Down>: cursor down to Insstart.col
 	case K_DOWN:
 	case Ctrl_J:
 	case 'j': ins_down(TRUE);
 		  break;
 
-	/* CTRL-G u: start new undoable edit */
+	// CTRL-G u: start new undoable edit
 	case 'u': u_sync(TRUE);
 		  ins_need_undo = TRUE;
 
-		  /* Need to reset Insstart, esp. because a BS that joins
-		   * a line to the previous one must save for undo. */
+		  // Need to reset Insstart, esp. because a BS that joins
+		  // a line to the previous one must save for undo.
 		  update_Insstart_orig = FALSE;
 		  Insstart = curwin->w_cursor;
 		  break;
 
-	/* CTRL-G U: do not break undo with the next char */
+	// CTRL-G U: do not break undo with the next char
 	case 'U':
-		  /* Allow one left/right cursor movement with the next char,
-		   * without breaking undo. */
+		  // Allow one left/right cursor movement with the next char,
+		  // without breaking undo.
 		  dont_sync_undo = MAYBE;
 		  break;
 
-	/* Unknown CTRL-G command, reserved for future expansion. */
+	// Unknown CTRL-G command, reserved for future expansion.
 	default:  vim_beep(BO_CTRLG);
     }
 }
@@ -4120,7 +4118,7 @@
 {
     if (map_to_exists_mode((char_u *)"", LANGMAP, FALSE))
     {
-	/* ":lmap" mappings exists, Toggle use of ":lmap" mappings. */
+	// ":lmap" mappings exists, Toggle use of ":lmap" mappings.
 	if (State & LANGMAP)
 	{
 	    curbuf->b_p_iminsert = B_IMODE_NONE;
@@ -4138,7 +4136,7 @@
 #ifdef HAVE_INPUT_METHOD
     else
     {
-	/* There are no ":lmap" mappings, toggle IM */
+	// There are no ":lmap" mappings, toggle IM
 	if (im_get_status())
 	{
 	    curbuf->b_p_iminsert = B_IMODE_NONE;
@@ -4155,12 +4153,12 @@
     set_iminsert_global();
     showmode();
 #ifdef FEAT_GUI
-    /* may show different cursor shape or color */
+    // may show different cursor shape or color
     if (gui.in_use)
 	gui_update_cursor(TRUE, FALSE);
 #endif
 #if defined(FEAT_KEYMAP)
-    /* Show/unshow value of 'keymap' in status lines. */
+    // Show/unshow value of 'keymap' in status lines.
     status_redraw_curbuf();
 #endif
 }
@@ -4174,7 +4172,7 @@
 ins_esc(
     long	*count,
     int		cmdchar,
-    int		nomove)	    /* don't move cursor */
+    int		nomove)	    // don't move cursor
 {
     int		temp;
     static int	disabled_redraw = FALSE;
@@ -4210,29 +4208,29 @@
 		*count = 0;
 	}
 
-	if (--*count > 0)	/* repeat what was typed */
+	if (--*count > 0)	// repeat what was typed
 	{
-	    /* Vi repeats the insert without replacing characters. */
+	    // Vi repeats the insert without replacing characters.
 	    if (vim_strchr(p_cpo, CPO_REPLCNT) != NULL)
 		State &= ~REPLACE_FLAG;
 
 	    (void)start_redo_ins();
 	    if (cmdchar == 'r' || cmdchar == 'v')
-		stuffRedoReadbuff(ESC_STR);	/* no ESC in redo buffer */
+		stuffRedoReadbuff(ESC_STR);	// no ESC in redo buffer
 	    ++RedrawingDisabled;
 	    disabled_redraw = TRUE;
-	    return FALSE;	/* repeat the insert */
+	    return FALSE;	// repeat the insert
 	}
 	stop_insert(&curwin->w_cursor, TRUE, nomove);
 	undisplay_dollar();
     }
 
-    /* When an autoindent was removed, curswant stays after the
-     * indent */
+    // When an autoindent was removed, curswant stays after the
+    // indent
     if (restart_edit == NUL && (colnr_T)temp == curwin->w_cursor.col)
 	curwin->w_set_curswant = TRUE;
 
-    /* Remember the last Insert position in the '^ mark. */
+    // Remember the last Insert position in the '^ mark.
     if (!cmdmod.keepjumps)
 	curbuf->b_last_insert = curwin->w_cursor;
 
@@ -4259,23 +4257,23 @@
 	else
 	{
 	    --curwin->w_cursor.col;
-	    /* Correct cursor for multi-byte character. */
+	    // Correct cursor for multi-byte character.
 	    if (has_mbyte)
 		mb_adjust_cursor();
 	}
     }
 
 #ifdef HAVE_INPUT_METHOD
-    /* Disable IM to allow typing English directly for Normal mode commands.
-     * When ":lmap" is enabled don't change 'iminsert' (IM can be enabled as
-     * well). */
+    // Disable IM to allow typing English directly for Normal mode commands.
+    // When ":lmap" is enabled don't change 'iminsert' (IM can be enabled as
+    // well).
     if (!(State & LANGMAP))
 	im_save_status(&curbuf->b_p_iminsert);
     im_set_active(FALSE);
 #endif
 
     State = NORMAL;
-    /* need to position cursor again (e.g. when on a TAB ) */
+    // need to position cursor again (e.g. when on a TAB )
     changed_cline_bef_curs();
 
     setmouse();
@@ -4356,18 +4354,18 @@
 # endif
 		if (!(mod_mask & MOD_MASK_SHIFT))
 		    break;
-		/* FALLTHROUGH */
+		// FALLTHROUGH
 	    case K_S_LEFT:
 	    case K_S_RIGHT:
 	    case K_S_UP:
 	    case K_S_DOWN:
 	    case K_S_END:
 	    case K_S_HOME:
-		/* Start selection right away, the cursor can move with
-		 * CTRL-O when beyond the end of the line. */
+		// Start selection right away, the cursor can move with
+		// CTRL-O when beyond the end of the line.
 		start_selection();
 
-		/* Execute the key in (insert) Select mode. */
+		// Execute the key in (insert) Select mode.
 		stuffcharReadbuff(Ctrl_O);
 		if (mod_mask)
 		{
@@ -4405,7 +4403,7 @@
     AppendCharToRedobuff(K_INS);
     showmode();
 #ifdef CURSOR_SHAPE
-    ui_cursor_shape();		/* may show different cursor shape */
+    ui_cursor_shape();		// may show different cursor shape
 #endif
 }
 
@@ -4423,7 +4421,7 @@
     else
 	restart_edit = 'I';
     if (virtual_active())
-	ins_at_eol = FALSE;	/* cursor always keeps its column */
+	ins_at_eol = FALSE;	// cursor always keeps its column
     else
 	ins_at_eol = (gchar_cursor() == NUL);
 }
@@ -4449,12 +4447,12 @@
 						  && curwin->w_cursor.col > 0)
     {
 	--curwin->w_cursor.col;
-	(void)del_char(FALSE);		/* delete the '^' or '0' */
-	/* In Replace mode, restore the characters that '^' or '0' replaced. */
+	(void)del_char(FALSE);		// delete the '^' or '0'
+	// In Replace mode, restore the characters that '^' or '0' replaced.
 	if (State & REPLACE_FLAG)
 	    replace_pop_ins();
 	if (lastc == '^')
-	    old_indent = get_indent();	/* remember curr. indent */
+	    old_indent = get_indent();	// remember curr. indent
 	change_indent(INDENT_SET, 0, TRUE, 0, TRUE);
     }
     else
@@ -4468,7 +4466,7 @@
     can_si_back = FALSE;
 #endif
 #ifdef FEAT_CINDENT
-    can_cindent = FALSE;	/* no cindenting after ^D or ^T */
+    can_cindent = FALSE;	// no cindenting after ^D or ^T
 #endif
 }
 
@@ -4479,24 +4477,24 @@
 
     if (stop_arrow() == FAIL)
 	return;
-    if (gchar_cursor() == NUL)		/* delete newline */
+    if (gchar_cursor() == NUL)		// delete newline
     {
 	temp = curwin->w_cursor.col;
-	if (!can_bs(BS_EOL)		/* only if "eol" included */
+	if (!can_bs(BS_EOL)		// only if "eol" included
 		|| do_join(2, FALSE, TRUE, FALSE, FALSE) == FAIL)
 	    vim_beep(BO_BS);
 	else
 	{
 	    curwin->w_cursor.col = temp;
-	    /* Adjust orig_line_count in case more lines have been deleted than
-	     * have been added. That makes sure, that open_line() later
-	     * can access all buffer lines correctly */
+	    // Adjust orig_line_count in case more lines have been deleted than
+	    // have been added. That makes sure, that open_line() later
+	    // can access all buffer lines correctly
 	    if (State & VREPLACE_FLAG &&
 		    orig_line_count > curbuf->b_ml.ml_line_count)
 		orig_line_count = curbuf->b_ml.ml_line_count;
 	}
     }
-    else if (del_char(FALSE) == FAIL)  /* delete char under cursor */
+    else if (del_char(FALSE) == FAIL)  // delete char under cursor
 	vim_beep(BO_BS);
     did_ai = FALSE;
 #ifdef FEAT_SMARTINDENT
@@ -4517,8 +4515,8 @@
     getvcol(curwin, &curwin->w_cursor, vcolp, NULL, NULL);
     if (State & REPLACE_FLAG)
     {
-	/* Don't delete characters before the insert point when in
-	 * Replace mode */
+	// Don't delete characters before the insert point when in
+	// Replace mode
 	if (curwin->w_cursor.lnum != Insstart.lnum
 		|| curwin->w_cursor.col >= Insstart.col)
 	    replace_do_bs(-1);
@@ -4539,13 +4537,13 @@
 {
     linenr_T	lnum;
     int		cc;
-    int		temp = 0;	    /* init for GCC */
+    int		temp = 0;	    // init for GCC
     colnr_T	save_col;
     colnr_T	mincol;
     int		did_backspace = FALSE;
     int		in_indent;
     int		oldState;
-    int		cpc[MAX_MCO];	    /* composing characters */
+    int		cpc[MAX_MCO];	    // composing characters
 
     /*
      * can't delete anything in an empty file
@@ -4578,17 +4576,16 @@
     if (in_indent)
 	can_cindent = FALSE;
 #endif
-    end_comment_pending = NUL;	/* After BS, don't auto-end comment */
+    end_comment_pending = NUL;	// After BS, don't auto-end comment
 #ifdef FEAT_RIGHTLEFT
-    if (revins_on)	    /* put cursor after last inserted char */
+    if (revins_on)	    // put cursor after last inserted char
 	inc_cursor();
 #endif
 
-    /* Virtualedit:
-     *	BACKSPACE_CHAR eats a virtual space
-     *	BACKSPACE_WORD eats all coladd
-     *	BACKSPACE_LINE eats all coladd and keeps going
-     */
+    // Virtualedit:
+    //	BACKSPACE_CHAR eats a virtual space
+    //	BACKSPACE_WORD eats all coladd
+    //	BACKSPACE_LINE eats all coladd and keeps going
     if (curwin->w_cursor.coladd > 0)
     {
 	if (mode == BACKSPACE_CHAR)
@@ -4629,7 +4626,7 @@
 	 */
 	cc = -1;
 	if (State & REPLACE_FLAG)
-	    cc = replace_pop();	    /* returns -1 if NL was inserted */
+	    cc = replace_pop();	    // returns -1 if NL was inserted
 	/*
 	 * In replace mode, in the line we started replacing, we only move the
 	 * cursor.
@@ -4643,12 +4640,12 @@
 	    if (!(State & VREPLACE_FLAG)
 				   || curwin->w_cursor.lnum > orig_line_count)
 	    {
-		temp = gchar_cursor();	/* remember current char */
+		temp = gchar_cursor();	// remember current char
 		--curwin->w_cursor.lnum;
 
-		/* When "aw" is in 'formatoptions' we must delete the space at
-		 * the end of the line, otherwise the line will be broken
-		 * again when auto-formatting. */
+		// When "aw" is in 'formatoptions' we must delete the space at
+		// the end of the line, otherwise the line will be broken
+		// again when auto-formatting.
 		if (has_format_option(FO_AUTO)
 					   && has_format_option(FO_WHITE_PAR))
 		{
@@ -4693,7 +4690,7 @@
 		    curwin->w_cursor.col = save_col;
 		    cc = replace_pop();
 		}
-		/* restore the characters that NL replaced */
+		// restore the characters that NL replaced
 		replace_pop_ins();
 		State = oldState;
 	    }
@@ -4706,11 +4703,11 @@
 	 * Delete character(s) before the cursor.
 	 */
 #ifdef FEAT_RIGHTLEFT
-	if (revins_on)		/* put cursor on last inserted char */
+	if (revins_on)		// put cursor on last inserted char
 	    dec_cursor();
 #endif
 	mincol = 0;
-						/* keep indent */
+						// keep indent
 	if (mode == BACKSPACE_LINE
 		&& (curbuf->b_p_ai
 #ifdef FEAT_CINDENT
@@ -4751,9 +4748,9 @@
 	    colnr_T	start_vcol;
 
 	    *inserted_space_p = FALSE;
-	    /* Compute the virtual column where we want to be.  Since
-	     * 'showbreak' may get in the way, need to get the last column of
-	     * the previous character. */
+	    // Compute the virtual column where we want to be.  Since
+	    // 'showbreak' may get in the way, need to get the last column of
+	    // the previous character.
 	    getvcol(curwin, &curwin->w_cursor, &vcol, NULL, NULL);
 	    start_vcol = vcol;
 	    dec_cursor();
@@ -4776,15 +4773,15 @@
 	    want_vcol = (want_vcol / ts) * ts;
 #endif
 
-	    /* delete characters until we are at or before want_vcol */
+	    // delete characters until we are at or before want_vcol
 	    while (vcol > want_vcol
 		    && (cc = *(ml_get_cursor() - 1), VIM_ISWHITE(cc)))
 		ins_bs_one(&vcol);
 
-	    /* insert extra spaces until we are at want_vcol */
+	    // insert extra spaces until we are at want_vcol
 	    while (vcol < want_vcol)
 	    {
-		/* Remember the first char we inserted */
+		// Remember the first char we inserted
 		if (curwin->w_cursor.lnum == Insstart_orig.lnum
 				   && curwin->w_cursor.col < Insstart_orig.col)
 		    Insstart_orig.col = curwin->w_cursor.col;
@@ -4800,8 +4797,8 @@
 		getvcol(curwin, &curwin->w_cursor, &vcol, NULL, NULL);
 	    }
 
-	    /* If we are now back where we started delete one character.  Can
-	     * happen when using 'sts' and 'linebreak'. */
+	    // If we are now back where we started delete one character.  Can
+	    // happen when using 'sts' and 'linebreak'.
 	    if (vcol >= start_vcol)
 		ins_bs_one(&vcol);
 	}
@@ -4818,25 +4815,25 @@
 	    do
 	    {
 #ifdef FEAT_RIGHTLEFT
-		if (!revins_on) /* put cursor on char to be deleted */
+		if (!revins_on) // put cursor on char to be deleted
 #endif
 		    dec_cursor();
 
 		cc = gchar_cursor();
-		/* look multi-byte character class */
+		// look multi-byte character class
 		if (has_mbyte)
 		{
 		    prev_cclass = cclass;
 		    cclass = mb_get_class(ml_get_cursor());
 		}
 
-		/* start of word? */
+		// start of word?
 		if (mode == BACKSPACE_WORD && !vim_isspace(cc))
 		{
 		    mode = BACKSPACE_WORD_NOT_SPACE;
 		    temp = vim_iswordc(cc);
 		}
-		/* end of word? */
+		// end of word?
 		else if (mode == BACKSPACE_WORD_NOT_SPACE
 			&& ((vim_isspace(cc) || vim_iswordc(cc) != temp)
 			|| prev_cclass != cclass))
@@ -4875,7 +4872,7 @@
 			break;
 #endif
 		}
-		/* Just a single backspace?: */
+		// Just a single backspace?:
 		if (mode == BACKSPACE_CHAR)
 		    break;
 	    } while (
@@ -4902,25 +4899,25 @@
      */
     AppendCharToRedobuff(c);
 
-    /* If deleted before the insertion point, adjust it */
+    // If deleted before the insertion point, adjust it
     if (curwin->w_cursor.lnum == Insstart_orig.lnum
 				  && curwin->w_cursor.col < Insstart_orig.col)
 	Insstart_orig.col = curwin->w_cursor.col;
 
-    /* vi behaviour: the cursor moves backward but the character that
-     *		     was there remains visible
-     * Vim behaviour: the cursor moves backward and the character that
-     *		      was there is erased from the screen.
-     * We can emulate the vi behaviour by pretending there is a dollar
-     * displayed even when there isn't.
-     *  --pkv Sun Jan 19 01:56:40 EST 2003 */
+    // vi behaviour: the cursor moves backward but the character that
+    //		     was there remains visible
+    // Vim behaviour: the cursor moves backward and the character that
+    //		      was there is erased from the screen.
+    // We can emulate the vi behaviour by pretending there is a dollar
+    // displayed even when there isn't.
+    //  --pkv Sun Jan 19 01:56:40 EST 2003
     if (vim_strchr(p_cpo, CPO_BACKSPACE) != NULL && dollar_vcol == -1)
 	dollar_vcol = curwin->w_virtcol;
 
 #ifdef FEAT_FOLDING
-    /* When deleting a char the cursor line must never be in a closed fold.
-     * E.g., when 'foldmethod' is indent and deleting the first non-white
-     * char before a Tab. */
+    // When deleting a char the cursor line must never be in a closed fold.
+    // E.g., when 'foldmethod' is indent and deleting the first non-white
+    // char before a Tab.
     if (did_backspace)
 	foldOpenCursor();
 #endif
@@ -4944,7 +4941,7 @@
     int		save_allow_keys = allow_keys;
     int		save_paste = p_paste;
 
-    /* If the end code is too long we can't detect it, read everything. */
+    // If the end code is too long we can't detect it, read everything.
     if (STRLEN(end) >= NUMBUFLEN)
 	end = NULL;
     ++no_mapping;
@@ -4975,7 +4972,7 @@
 	if (end != NULL && STRNCMP(buf, end, idx) == 0)
 	{
 	    if (end[idx] == NUL)
-		break; /* Found the end of paste code. */
+		break; // Found the end of paste code.
 	    continue;
 	}
 	if (!drop)
@@ -5035,7 +5032,7 @@
     static void
 ins_tabline(int c)
 {
-    /* We will be leaving the current window, unless closing another tab. */
+    // We will be leaving the current window, unless closing another tab.
     if (c != K_TABMENU || current_tabmenu != TABLINE_MENU_CLOSE
 		|| (current_tab != 0 && current_tab != tabpage_index(curtab)))
     {
@@ -5051,7 +5048,7 @@
     else
     {
 	handle_tabmenu();
-	redraw_statuslines();	/* will redraw the tabline when needed */
+	redraw_statuslines();	// will redraw the tabline when needed
     }
 }
 #endif
@@ -5105,8 +5102,8 @@
     if (oneleft() == OK)
     {
 #if defined(FEAT_XIM) && defined(FEAT_GUI_GTK)
-	/* Only call start_arrow() when not busy with preediting, it will
-	 * break undo.  K_LEFT is inserted in im_correct_cursor(). */
+	// Only call start_arrow() when not busy with preediting, it will
+	// break undo.  K_LEFT is inserted in im_correct_cursor().
 	if (p_imst == IM_OVER_THE_SPOT || !im_is_preediting())
 #endif
 	{
@@ -5115,7 +5112,7 @@
 		AppendCharToRedobuff(K_LEFT);
 	}
 #ifdef FEAT_RIGHTLEFT
-	/* If exit reversed string, position is fixed */
+	// If exit reversed string, position is fixed
 	if (revins_scol != -1 && (int)curwin->w_cursor.col >= revins_scol)
 	    revins_legal++;
 	revins_chars++;
@@ -5128,11 +5125,11 @@
      */
     else if (vim_strchr(p_ww, '[') != NULL && curwin->w_cursor.lnum > 1)
     {
-	/* always break undo when moving upwards/downwards, else undo may break */
+	// always break undo when moving upwards/downwards, else undo may break
 	start_arrow(&tpos);
 	--(curwin->w_cursor.lnum);
 	coladvance((colnr_T)MAXCOL);
-	curwin->w_set_curswant = TRUE;	/* so we stay at the end */
+	curwin->w_set_curswant = TRUE;	// so we stay at the end
     }
     else
 	vim_beep(BO_CRSR);
@@ -5231,8 +5228,8 @@
 	    revins_chars--;
 #endif
     }
-    /* if 'whichwrap' set for cursor in insert mode, may move the
-     * cursor to the next line */
+    // if 'whichwrap' set for cursor in insert mode, may move the
+    // cursor to the next line
     else if (vim_strchr(p_ww, ']') != NULL
 	    && curwin->w_cursor.lnum < curbuf->b_ml.ml_line_count)
     {
@@ -5271,7 +5268,7 @@
 
     static void
 ins_up(
-    int		startcol)	/* when TRUE move to Insstart.col */
+    int		startcol)	// when TRUE move to Insstart.col
 {
     pos_T	tpos;
     linenr_T	old_topline = curwin->w_topline;
@@ -5309,7 +5306,7 @@
 
     if (mod_mask & MOD_MASK_CTRL)
     {
-	/* <C-PageUp>: tab page back */
+	// <C-PageUp>: tab page back
 	if (first_tabpage->tp_next != NULL)
 	{
 	    start_arrow(&curwin->w_cursor);
@@ -5332,7 +5329,7 @@
 
     static void
 ins_down(
-    int		startcol)	/* when TRUE move to Insstart.col */
+    int		startcol)	// when TRUE move to Insstart.col
 {
     pos_T	tpos;
     linenr_T	old_topline = curwin->w_topline;
@@ -5370,7 +5367,7 @@
 
     if (mod_mask & MOD_MASK_CTRL)
     {
-	/* <C-PageDown>: tab page forward */
+	// <C-PageDown>: tab page forward
 	if (first_tabpage->tp_next != NULL)
 	{
 	    start_arrow(&curwin->w_cursor);
@@ -5427,7 +5424,7 @@
     if (!curbuf->b_p_et
 #ifdef FEAT_VARTABS
 	    && !(p_sta && ind
-		/* These five lines mean 'tabstop' != 'shiftwidth' */
+		// These five lines mean 'tabstop' != 'shiftwidth'
 		&& ((tabstop_count(curbuf->b_p_vts_array) > 1)
 		    || (tabstop_count(curbuf->b_p_vts_array) == 1
 		        && tabstop_first(curbuf->b_p_vts_array)
@@ -5453,24 +5450,24 @@
     AppendToRedobuff((char_u *)"\t");
 
 #ifdef FEAT_VARTABS
-    if (p_sta && ind)		/* insert tab in indent, use 'shiftwidth' */
+    if (p_sta && ind)		// insert tab in indent, use 'shiftwidth'
     {
 	temp = (int)get_sw_value(curbuf);
 	temp -= get_nolist_virtcol() % temp;
     }
     else if (tabstop_count(curbuf->b_p_vsts_array) > 0 || curbuf->b_p_sts != 0)
-	                        /* use 'softtabstop' when set */
+	                        // use 'softtabstop' when set
 	temp = tabstop_padding(get_nolist_virtcol(), get_sts_value(),
 						     curbuf->b_p_vsts_array);
-    else			/* otherwise use 'tabstop' */
+    else			// otherwise use 'tabstop'
 	temp = tabstop_padding(get_nolist_virtcol(), curbuf->b_p_ts,
 						     curbuf->b_p_vts_array);
 #else
-    if (p_sta && ind)		/* insert tab in indent, use 'shiftwidth' */
+    if (p_sta && ind)		// insert tab in indent, use 'shiftwidth'
 	temp = (int)get_sw_value(curbuf);
-    else if (curbuf->b_p_sts != 0) /* use 'softtabstop' when set */
+    else if (curbuf->b_p_sts != 0) // use 'softtabstop' when set
 	temp = (int)get_sts_value();
-    else			/* otherwise use 'tabstop' */
+    else			// otherwise use 'tabstop'
 	temp = (int)curbuf->b_p_ts;
     temp -= get_nolist_virtcol() % temp;
 #endif
@@ -5488,7 +5485,7 @@
 	else
 	{
 	    ins_str((char_u *)" ");
-	    if (State & REPLACE_FLAG)	    /* no char replaced */
+	    if (State & REPLACE_FLAG)	    // no char replaced
 		replace_push(NUL);
 	}
     }
@@ -5505,7 +5502,7 @@
 #endif
     {
 	char_u		*ptr;
-	char_u		*saved_line = NULL;	/* init for GCC */
+	char_u		*saved_line = NULL;	// init for GCC
 	pos_T		pos;
 	pos_T		fpos;
 	pos_T		*cursor;
@@ -5532,11 +5529,11 @@
 	    cursor = &curwin->w_cursor;
 	}
 
-	/* When 'L' is not in 'cpoptions' a tab always takes up 'ts' spaces. */
+	// When 'L' is not in 'cpoptions' a tab always takes up 'ts' spaces.
 	if (vim_strchr(p_cpo, CPO_LISTWM) == NULL)
 	    curwin->w_p_list = FALSE;
 
-	/* Find first white before the cursor */
+	// Find first white before the cursor
 	fpos = curwin->w_cursor;
 	while (fpos.col > 0 && VIM_ISWHITE(ptr[-1]))
 	{
@@ -5544,7 +5541,7 @@
 	    --ptr;
 	}
 
-	/* In Replace mode, don't change characters before the insert point. */
+	// In Replace mode, don't change characters before the insert point.
 	if ((State & REPLACE_FLAG)
 		&& fpos.lnum == Insstart.lnum
 		&& fpos.col < Insstart.col)
@@ -5553,12 +5550,12 @@
 	    fpos.col = Insstart.col;
 	}
 
-	/* compute virtual column numbers of first white and cursor */
+	// compute virtual column numbers of first white and cursor
 	getvcol(curwin, &fpos, &vcol, NULL, NULL);
 	getvcol(curwin, cursor, &want_vcol, NULL, NULL);
 
-	/* Use as many TABs as possible.  Beware of 'breakindent', 'showbreak'
-	 * and 'linebreak' adding extra virtual columns. */
+	// Use as many TABs as possible.  Beware of 'breakindent', 'showbreak'
+	// and 'linebreak' adding extra virtual columns.
 	while (VIM_ISWHITE(*ptr))
 	{
 	    i = lbr_chartabsize(NULL, (char_u *)"\t", vcol);
@@ -5569,8 +5566,8 @@
 		*ptr = TAB;
 		if (change_col < 0)
 		{
-		    change_col = fpos.col;  /* Column of first change */
-		    /* May have to adjust Insstart */
+		    change_col = fpos.col;  // Column of first change
+		    // May have to adjust Insstart
 		    if (fpos.lnum == Insstart.lnum && fpos.col < Insstart.col)
 			Insstart.col = fpos.col;
 		}
@@ -5585,7 +5582,7 @@
 	    int repl_off = 0;
 	    char_u *line = ptr;
 
-	    /* Skip over the spaces we need. */
+	    // Skip over the spaces we need.
 	    while (vcol < want_vcol && *ptr == ' ')
 	    {
 		vcol += lbr_chartabsize(line, ptr, vcol);
@@ -5594,18 +5591,18 @@
 	    }
 	    if (vcol > want_vcol)
 	    {
-		/* Must have a char with 'showbreak' just before it. */
+		// Must have a char with 'showbreak' just before it.
 		--ptr;
 		--repl_off;
 	    }
 	    fpos.col += repl_off;
 
-	    /* Delete following spaces. */
+	    // Delete following spaces.
 	    i = cursor->col - fpos.col;
 	    if (i > 0)
 	    {
 		STRMOVE(ptr, ptr + i);
-		/* correct replace stack. */
+		// correct replace stack.
 		if ((State & REPLACE_FLAG) && !(State & VREPLACE_FLAG))
 		    for (temp = i; --temp >= 0; )
 			replace_join(repl_off);
@@ -5630,11 +5627,11 @@
 	     */
 	    if (State & VREPLACE_FLAG)
 	    {
-		/* Backspace from real cursor to change_col */
+		// Backspace from real cursor to change_col
 		backspace_until_column(change_col);
 
-		/* Insert each char in saved_line from changed_col to
-		 * ptr-cursor */
+		// Insert each char in saved_line from changed_col to
+		// ptr-cursor
 		ins_bytes_len(saved_line + change_col,
 						    cursor->col - change_col);
 	    }
@@ -5678,14 +5675,14 @@
      * in open_line().
      */
 
-    /* Put cursor on NUL if on the last char and coladd is 1 (happens after
-     * CTRL-O). */
+    // Put cursor on NUL if on the last char and coladd is 1 (happens after
+    // CTRL-O).
     if (virtual_active() && curwin->w_cursor.coladd > 0)
 	coladvance(getviscol());
 
 #ifdef FEAT_RIGHTLEFT
-    /* NL in reverse insert will always start in the end of
-     * current line. */
+    // NL in reverse insert will always start in the end of
+    // current line.
     if (revins_on)
 	curwin->w_cursor.col += (colnr_T)STRLEN(ml_get_cursor());
 #endif
@@ -5698,7 +5695,7 @@
     can_cindent = TRUE;
 #endif
 #ifdef FEAT_FOLDING
-    /* When inserting a line the cursor line must never be in a closed fold. */
+    // When inserting a line the cursor line must never be in a closed fold.
     foldOpenCursor();
 #endif
 
@@ -5721,7 +5718,7 @@
     pc_status = PC_STATUS_UNSET;
     if (redrawing() && !char_avail())
     {
-	/* may need to redraw when no more chars available now */
+	// may need to redraw when no more chars available now
 	ins_redraw(FALSE);
 
 	edit_putchar('?', TRUE);
@@ -5732,22 +5729,22 @@
     }
 
 #ifdef USE_ON_FLY_SCROLL
-    dont_scroll = TRUE;		/* disallow scrolling here */
+    dont_scroll = TRUE;		// disallow scrolling here
 #endif
 
-    /* don't map the digraph chars. This also prevents the
-     * mode message to be deleted when ESC is hit */
+    // don't map the digraph chars. This also prevents the
+    // mode message to be deleted when ESC is hit
     ++no_mapping;
     ++allow_keys;
     c = plain_vgetc();
     --no_mapping;
     --allow_keys;
     if (did_putchar)
-	/* when the line fits in 'columns' the '?' is at the start of the next
-	 * line and will not be removed by the redraw */
+	// when the line fits in 'columns' the '?' is at the start of the next
+	// line and will not be removed by the redraw
 	edit_unputchar();
 
-    if (IS_SPECIAL(c) || mod_mask)	    /* special key */
+    if (IS_SPECIAL(c) || mod_mask)	    // special key
     {
 #ifdef FEAT_CMDL_INFO
 	clear_showcmd();
@@ -5760,7 +5757,7 @@
 	did_putchar = FALSE;
 	if (redrawing() && !char_avail())
 	{
-	    /* may need to redraw when no more chars available now */
+	    // may need to redraw when no more chars available now
 	    ins_redraw(FALSE);
 
 	    if (char2cells(c) == 1)
@@ -5779,8 +5776,8 @@
 	--no_mapping;
 	--allow_keys;
 	if (did_putchar)
-	    /* when the line fits in 'columns' the '?' is at the start of the
-	     * next line and will not be removed by a redraw */
+	    // when the line fits in 'columns' the '?' is at the start of the
+	    // next line and will not be removed by a redraw
 	    edit_unputchar();
 	if (cc != ESC)
 	{
@@ -5817,7 +5814,7 @@
 	return NUL;
     }
 
-    /* try to advance to the cursor column */
+    // try to advance to the cursor column
     temp = 0;
     line = ptr = ml_get(lnum);
     prev_ptr = ptr;
@@ -5859,12 +5856,12 @@
 	{
 	    long	tw_save;
 
-	    /* The character must be taken literally, insert like it
-	     * was typed after a CTRL-V, and pretend 'textwidth'
-	     * wasn't set.  Digits, 'o' and 'x' are special after a
-	     * CTRL-V, don't use it for these. */
+	    // The character must be taken literally, insert like it
+	    // was typed after a CTRL-V, and pretend 'textwidth'
+	    // wasn't set.  Digits, 'o' and 'x' are special after a
+	    // CTRL-V, don't use it for these.
 	    if (c < 256 && !isalnum(c))
-		AppendToRedobuff((char_u *)CTRL_V_STR);	/* CTRL-V */
+		AppendToRedobuff((char_u *)CTRL_V_STR);	// CTRL-V
 	    tw_save = curbuf->b_p_tw;
 	    curbuf->b_p_tw = -1;
 	    insert_special(c, TRUE, FALSE);
@@ -5873,7 +5870,7 @@
 	    revins_chars++;
 	    revins_legal++;
 #endif
-	    c = Ctrl_V;	/* pretend CTRL-V is last character */
+	    c = Ctrl_V;	// pretend CTRL-V is last character
 	    auto_format(FALSE, TRUE);
 	}
     }
@@ -5912,7 +5909,7 @@
     char_u	buf[MB_MAXBYTES + 1];
     int		save_State = State;
 
-    /* Return quickly when there is nothing to do. */
+    // Return quickly when there is nothing to do.
     if (!has_insertcharpre())
 	return NULL;
 
@@ -5924,21 +5921,21 @@
 	buf[1] = NUL;
     }
 
-    /* Lock the text to avoid weird things from happening. */
+    // Lock the text to avoid weird things from happening.
     ++textlock;
-    set_vim_var_string(VV_CHAR, buf, -1);  /* set v:char */
+    set_vim_var_string(VV_CHAR, buf, -1);  // set v:char
 
     res = NULL;
     if (ins_apply_autocmds(EVENT_INSERTCHARPRE))
     {
-	/* Get the value of v:char.  It may be empty or more than one
-	 * character.  Only use it when changed, otherwise continue with the
-	 * original character to avoid breaking autoindent. */
+	// Get the value of v:char.  It may be empty or more than one
+	// character.  Only use it when changed, otherwise continue with the
+	// original character to avoid breaking autoindent.
 	if (STRCMP(buf, get_vim_var_str(VV_CHAR)) != 0)
 	    res = vim_strsave(get_vim_var_str(VV_CHAR));
     }
 
-    set_vim_var_string(VV_CHAR, NULL, -1);  /* clear v:char */
+    set_vim_var_string(VV_CHAR, NULL, -1);  // clear v:char
     --textlock;
 
     // Restore the State, it may have been changed.
diff --git a/src/eval.c b/src/eval.c
index c37d6fd..178f473 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -36,19 +36,19 @@
  */
 static int current_copyID = 0;
 
-static int echo_attr = 0;   /* attributes used for ":echo" */
+static int echo_attr = 0;   // attributes used for ":echo"
 
 /*
  * Info used by a ":for" loop.
  */
 typedef struct
 {
-    int		fi_semicolon;	/* TRUE if ending in '; var]' */
-    int		fi_varcount;	/* nr of variables in the list */
-    listwatch_T	fi_lw;		/* keep an eye on the item used. */
-    list_T	*fi_list;	/* list being used */
-    int		fi_bi;		/* index of blob */
-    blob_T	*fi_blob;	/* blob being used */
+    int		fi_semicolon;	// TRUE if ending in '; var]'
+    int		fi_varcount;	// nr of variables in the list
+    listwatch_T	fi_lw;		// keep an eye on the item used.
+    list_T	*fi_list;	// list being used
+    int		fi_bi;		// index of blob
+    blob_T	*fi_blob;	// blob being used
 } forinfo_T;
 
 static int tv_op(typval_T *tv1, typval_T *tv2, char_u  *op);
@@ -174,7 +174,7 @@
     char_u	*arg,
     int		*error,
     char_u	**nextcmd,
-    int		skip)	    /* only parse, don't execute */
+    int		skip)	    // only parse, don't execute
 {
     typval_T	tv;
     varnumber_T	retval = FALSE;
@@ -261,7 +261,7 @@
 	s = skipwhite(s);
 	if (eval1_emsg(&s, rettv, TRUE) == FAIL)
 	    return FAIL;
-	if (*s != NUL)  /* check for trailing chars after expr */
+	if (*s != NUL)  // check for trailing chars after expr
 	{
 	    clear_tv(rettv);
 	    semsg(_(e_invexpr2), s);
@@ -300,7 +300,7 @@
 eval_to_string_skip(
     char_u	*arg,
     char_u	**nextcmd,
-    int		skip)	    /* only parse, don't execute */
+    int		skip)	    // only parse, don't execute
 {
     typval_T	tv;
     char_u	*retval;
@@ -467,7 +467,7 @@
     int		ret;
     funcexe_T	funcexe;
 
-    rettv->v_type = VAR_UNKNOWN;		/* clear_tv() uses this */
+    rettv->v_type = VAR_UNKNOWN;		// clear_tv() uses this
     vim_memset(&funcexe, 0, sizeof(funcexe));
     funcexe.firstline = curwin->w_cursor.lnum;
     funcexe.lastline = curwin->w_cursor.lnum;
@@ -574,15 +574,15 @@
 	retval = 0;
     else
     {
-	/* If the result is a number, just return the number. */
+	// If the result is a number, just return the number.
 	if (tv.v_type == VAR_NUMBER)
 	    retval = tv.vval.v_number;
 	else if (tv.v_type != VAR_STRING || tv.vval.v_string == NULL)
 	    retval = 0;
 	else
 	{
-	    /* If the result is a string, check if there is a non-digit before
-	     * the number. */
+	    // If the result is a string, check if there is a non-digit before
+	    // the number.
 	    s = tv.vval.v_string;
 	    if (!VIM_ISDIGIT(*s) && *s != '-')
 		*cp = *s++;
@@ -625,8 +625,8 @@
     lval_T	*lp,
     int		unlet,
     int		skip,
-    int		flags,	    /* GLV_ values */
-    int		fne_flags)  /* flags for find_name_end() */
+    int		flags,	    // GLV_ values
+    int		fne_flags)  // flags for find_name_end()
 {
     char_u	*p;
     char_u	*expr_start, *expr_end;
@@ -641,21 +641,21 @@
     hashtab_T	*ht;
     int		quiet = flags & GLV_QUIET;
 
-    /* Clear everything in "lp". */
+    // Clear everything in "lp".
     vim_memset(lp, 0, sizeof(lval_T));
 
     if (skip)
     {
-	/* When skipping just find the end of the name. */
+	// When skipping just find the end of the name.
 	lp->ll_name = name;
 	return find_name_end(name, NULL, NULL, FNE_INCL_BR | fne_flags);
     }
 
-    /* Find the end of the name. */
+    // Find the end of the name.
     p = find_name_end(name, &expr_start, &expr_end, fne_flags);
     if (expr_start != NULL)
     {
-	/* Don't expand the name when we already know there is an error. */
+	// Don't expand the name when we already know there is an error.
 	if (unlet && !VIM_ISWHITE(*p) && !ends_excmd(*p)
 						    && *p != '[' && *p != '.')
 	{
@@ -666,9 +666,9 @@
 	lp->ll_exp_name = make_expanded_name(name, expr_start, expr_end, p);
 	if (lp->ll_exp_name == NULL)
 	{
-	    /* Report an invalid expression in braces, unless the
-	     * expression evaluation has been cancelled due to an
-	     * aborting error, an interrupt, or an exception. */
+	    // Report an invalid expression in braces, unless the
+	    // expression evaluation has been cancelled due to an
+	    // aborting error, an interrupt, or an exception.
 	    if (!aborting() && !quiet)
 	    {
 		emsg_severe = TRUE;
@@ -681,14 +681,14 @@
     else
 	lp->ll_name = name;
 
-    /* Without [idx] or .key we are done. */
+    // Without [idx] or .key we are done.
     if ((*p != '[' && *p != '.') || lp->ll_name == NULL)
 	return p;
 
     cc = *p;
     *p = NUL;
-    /* Only pass &ht when we would write to the variable, it prevents autoload
-     * as well. */
+    // Only pass &ht when we would write to the variable, it prevents autoload
+    // as well.
     v = find_var(lp->ll_name, (flags & GLV_READ_ONLY) ? NULL : &ht,
 						      flags & GLV_NO_AUTOLOAD);
     if (v == NULL && !quiet)
@@ -738,24 +738,24 @@
 	}
 	else
 	{
-	    /* Get the index [expr] or the first index [expr: ]. */
+	    // Get the index [expr] or the first index [expr: ].
 	    p = skipwhite(p + 1);
 	    if (*p == ':')
 		empty1 = TRUE;
 	    else
 	    {
 		empty1 = FALSE;
-		if (eval1(&p, &var1, TRUE) == FAIL)	/* recursive! */
+		if (eval1(&p, &var1, TRUE) == FAIL)	// recursive!
 		    return NULL;
 		if (tv_get_string_chk(&var1) == NULL)
 		{
-		    /* not a number or string */
+		    // not a number or string
 		    clear_tv(&var1);
 		    return NULL;
 		}
 	    }
 
-	    /* Optionally get the second index [ :expr]. */
+	    // Optionally get the second index [ :expr].
 	    if (*p == ':')
 	    {
 		if (lp->ll_tv->v_type == VAR_DICT)
@@ -782,14 +782,14 @@
 		else
 		{
 		    lp->ll_empty2 = FALSE;
-		    if (eval1(&p, &var2, TRUE) == FAIL)	/* recursive! */
+		    if (eval1(&p, &var2, TRUE) == FAIL)	// recursive!
 		    {
 			clear_tv(&var1);
 			return NULL;
 		    }
 		    if (tv_get_string_chk(&var2) == NULL)
 		    {
-			/* not a number or string */
+			// not a number or string
 			clear_tv(&var1);
 			clear_tv(&var2);
 			return NULL;
@@ -809,7 +809,7 @@
 		return NULL;
 	    }
 
-	    /* Skip to past ']'. */
+	    // Skip to past ']'.
 	    ++p;
 	}
 
@@ -817,8 +817,8 @@
 	{
 	    if (len == -1)
 	    {
-		/* "[key]": get key from "var1" */
-		key = tv_get_string_chk(&var1);	/* is number or string */
+		// "[key]": get key from "var1"
+		key = tv_get_string_chk(&var1);	// is number or string
 		if (key == NULL)
 		{
 		    clear_tv(&var1);
@@ -829,9 +829,9 @@
 	    lp->ll_dict = lp->ll_tv->vval.v_dict;
 	    lp->ll_di = dict_find(lp->ll_dict, key, len);
 
-	    /* When assigning to a scope dictionary check that a function and
-	     * variable name is valid (only variable name unless it is l: or
-	     * g: dictionary). Disallow overwriting a builtin function. */
+	    // When assigning to a scope dictionary check that a function and
+	    // variable name is valid (only variable name unless it is l: or
+	    // g: dictionary). Disallow overwriting a builtin function.
 	    if (rettv != NULL && lp->ll_dict->dv_scope != 0)
 	    {
 		int prevval;
@@ -843,7 +843,7 @@
 		    key[len] = NUL;
 		}
 		else
-		    prevval = 0; /* avoid compiler warning */
+		    prevval = 0; // avoid compiler warning
 		wrong = (lp->ll_dict->dv_scope == VAR_DEF_SCOPE
 			       && rettv->v_type == VAR_FUNC
 			       && var_check_func_name(key, lp->ll_di == NULL))
@@ -882,7 +882,7 @@
 		    p = NULL;
 		break;
 	    }
-	    /* existing variable, need to check if it can be changed */
+	    // existing variable, need to check if it can be changed
 	    else if ((flags & GLV_READ_ONLY) == 0
 			     && var_check_ro(lp->ll_di->di_flags, name, FALSE))
 	    {
@@ -941,7 +941,7 @@
 	    if (empty1)
 		lp->ll_n1 = 0;
 	    else
-		/* is number or string */
+		// is number or string
 		lp->ll_n1 = (long)tv_get_number(&var1);
 	    clear_tv(&var1);
 
@@ -973,7 +973,7 @@
 	    if (lp->ll_range && !lp->ll_empty2)
 	    {
 		lp->ll_n2 = (long)tv_get_number(&var2);
-						    /* is number or string */
+						    // is number or string
 		clear_tv(&var2);
 		if (lp->ll_n2 < 0)
 		{
@@ -987,7 +987,7 @@
 		    lp->ll_n2 = list_idx_of_item(lp->ll_list, ni);
 		}
 
-		/* Check that lp->ll_n2 isn't before lp->ll_n1. */
+		// Check that lp->ll_n2 isn't before lp->ll_n1.
 		if (lp->ll_n1 < 0)
 		    lp->ll_n1 = list_idx_of_item(lp->ll_list, lp->ll_li);
 		if (lp->ll_n2 < lp->ll_n1)
@@ -1164,7 +1164,7 @@
 		break;
 	    if (lp->ll_li->li_next == NULL)
 	    {
-		/* Need to add an empty item. */
+		// Need to add an empty item.
 		if (list_append_number(lp->ll_list, 0) == FAIL)
 		{
 		    ri = NULL;
@@ -1199,7 +1199,7 @@
 		return;
 	    }
 
-	    /* Need to add an item to the Dictionary. */
+	    // Need to add an item to the Dictionary.
 	    di = dictitem_alloc(lp->ll_newkey);
 	    if (di == NULL)
 		return;
@@ -1244,7 +1244,7 @@
     char_u	numbuf[NUMBUFLEN];
     char_u	*s;
 
-    /* Can't do anything with a Funcref, Dict, v:true on the right. */
+    // Can't do anything with a Funcref, Dict, v:true on the right.
     if (tv2->v_type != VAR_FUNC && tv2->v_type != VAR_DICT
 						&& tv2->v_type != VAR_SPECIAL)
     {
@@ -1386,7 +1386,7 @@
     typval_T	tv;
     list_T	*l;
 
-    *errp = TRUE;	/* default: there is an error */
+    *errp = TRUE;	// default: there is an error
 
     fi = ALLOC_CLEAR_ONE(forinfo_T);
     if (fi == NULL)
@@ -1526,7 +1526,7 @@
 	xp->xp_context = EXPAND_USER_VARS;
 	if (vim_strpbrk(arg, (char_u *)"\"'+-*/%.=!?~|&$([<>,#") == NULL)
 	{
-	    /* ":let var1 var2 ...": find last space. */
+	    // ":let var1 var2 ...": find last space.
 	    for (p = arg + STRLEN(arg); p >= arg; )
 	    {
 		xp->xp_pattern = p;
@@ -1563,7 +1563,7 @@
 	}
 	else if (c == '$')
 	{
-	    /* environment variable */
+	    // environment variable
 	    xp->xp_context = EXPAND_ENV_VARS;
 	}
 	else if (c == '=')
@@ -1574,28 +1574,28 @@
 	else if (c == '#'
 		&& xp->xp_context == EXPAND_EXPRESSION)
 	{
-	    /* Autoload function/variable contains '#'. */
+	    // Autoload function/variable contains '#'.
 	    break;
 	}
 	else if ((c == '<' || c == '#')
 		&& xp->xp_context == EXPAND_FUNCTIONS
 		&& vim_strchr(xp->xp_pattern, '(') == NULL)
 	{
-	    /* Function name can start with "<SNR>" and contain '#'. */
+	    // Function name can start with "<SNR>" and contain '#'.
 	    break;
 	}
 	else if (cmdidx != CMD_let || got_eq)
 	{
-	    if (c == '"')	    /* string */
+	    if (c == '"')	    // string
 	    {
 		while ((c = *++xp->xp_pattern) != NUL && c != '"')
 		    if (c == '\\' && xp->xp_pattern[1] != NUL)
 			++xp->xp_pattern;
 		xp->xp_context = EXPAND_NOTHING;
 	    }
-	    else if (c == '\'')	    /* literal string */
+	    else if (c == '\'')	    // literal string
 	    {
-		/* Trick: '' is like stopping and starting a literal string. */
+		// Trick: '' is like stopping and starting a literal string.
 		while ((c = *++xp->xp_pattern) != NUL && c != '\'')
 		    /* skip */ ;
 		xp->xp_context = EXPAND_NOTHING;
@@ -1614,8 +1614,8 @@
 		xp->xp_context = EXPAND_EXPRESSION;
 	}
 	else
-	    /* Doesn't look like something valid, expand as an expression
-	     * anyway. */
+	    // Doesn't look like something valid, expand as an expression
+	    // anyway.
 	    xp->xp_context = EXPAND_EXPRESSION;
 	arg = xp->xp_pattern;
 	if (*arg != NUL)
@@ -1636,7 +1636,7 @@
     char_u	*save_cpo;
     regmatch_T	regmatch;
 
-    /* avoid 'l' flag in 'cpoptions' */
+    // avoid 'l' flag in 'cpoptions'
     save_cpo = p_cpo;
     p_cpo = (char_u *)"";
     regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
@@ -1672,12 +1672,12 @@
     if (!evaluate)
 	check_vars(s, len);
 
-    /* If "s" is the name of a variable of type VAR_FUNC
-     * use its contents. */
+    // If "s" is the name of a variable of type VAR_FUNC
+    // use its contents.
     s = deref_func_name(s, &len, &partial, !evaluate);
 
-    /* Need to make a copy, in case evaluating the arguments makes
-     * the name invalid. */
+    // Need to make a copy, in case evaluating the arguments makes
+    // the name invalid.
     s = vim_strsave(s);
     if (s == NULL)
 	ret = FAIL;
@@ -1696,18 +1696,18 @@
     }
     vim_free(s);
 
-    /* If evaluate is FALSE rettv->v_type was not set in
-     * get_func_tv, but it's needed in handle_subscript() to parse
-     * what follows. So set it here. */
+    // If evaluate is FALSE rettv->v_type was not set in
+    // get_func_tv, but it's needed in handle_subscript() to parse
+    // what follows. So set it here.
     if (rettv->v_type == VAR_UNKNOWN && !evaluate && **arg == '(')
     {
 	rettv->vval.v_string = NULL;
 	rettv->v_type = VAR_FUNC;
     }
 
-    /* Stop the expression evaluation when immediately
-     * aborting on error, or when an interrupt occurred or
-     * an exception was thrown but not caught. */
+    // Stop the expression evaluation when immediately
+    // aborting on error, or when an interrupt occurred or
+    // an exception was thrown but not caught.
     if (evaluate && aborting())
     {
 	if (ret == OK)
@@ -1806,7 +1806,7 @@
 	 * Get the second variable.
 	 */
 	*arg = skipwhite(*arg + 1);
-	if (eval1(arg, rettv, evaluate && result) == FAIL) /* recursive! */
+	if (eval1(arg, rettv, evaluate && result) == FAIL) // recursive!
 	    return FAIL;
 
 	/*
@@ -1824,7 +1824,7 @@
 	 * Get the third variable.
 	 */
 	*arg = skipwhite(*arg + 1);
-	if (eval1(arg, &var2, evaluate && !result) == FAIL) /* recursive! */
+	if (eval1(arg, &var2, evaluate && !result) == FAIL) // recursive!
 	{
 	    if (evaluate && result)
 		clear_tv(rettv);
@@ -1998,7 +1998,7 @@
     char_u	*p;
     int		i;
     exptype_T	type = TYPE_UNKNOWN;
-    int		type_is = FALSE;    /* TRUE for "is" and "isnot" */
+    int		type_is = FALSE;    // TRUE for "is" and "isnot"
     int		len = 2;
     int		ic;
 
@@ -2056,19 +2056,19 @@
      */
     if (type != TYPE_UNKNOWN)
     {
-	/* extra question mark appended: ignore case */
+	// extra question mark appended: ignore case
 	if (p[len] == '?')
 	{
 	    ic = TRUE;
 	    ++len;
 	}
-	/* extra '#' appended: match case */
+	// extra '#' appended: match case
 	else if (p[len] == '#')
 	{
 	    ic = FALSE;
 	    ++len;
 	}
-	/* nothing appended: use 'ignorecase' */
+	// nothing appended: use 'ignorecase'
 	else
 	    ic = p_ic;
 
@@ -2145,13 +2145,13 @@
 #endif
 		)
 	{
-	    /* For "list + ...", an illegal use of the first operand as
-	     * a number cannot be determined before evaluating the 2nd
-	     * operand: if this is also a list, all is ok.
-	     * For "something . ...", "something - ..." or "non-list + ...",
-	     * we know that the first operand needs to be a string or number
-	     * without evaluating the 2nd operand.  So check before to avoid
-	     * side effects after an error. */
+	    // For "list + ...", an illegal use of the first operand as
+	    // a number cannot be determined before evaluating the 2nd
+	    // operand: if this is also a list, all is ok.
+	    // For "something . ...", "something - ..." or "non-list + ...",
+	    // we know that the first operand needs to be a string or number
+	    // without evaluating the 2nd operand.  So check before to avoid
+	    // side effects after an error.
 	    if (evaluate && tv_get_string_chk(rettv) == NULL)
 	    {
 		clear_tv(rettv);
@@ -2178,9 +2178,9 @@
 	     */
 	    if (op == '.')
 	    {
-		s1 = tv_get_string_buf(rettv, buf1);	/* already checked */
+		s1 = tv_get_string_buf(rettv, buf1);	// already checked
 		s2 = tv_get_string_buf_chk(&var2, buf2);
-		if (s2 == NULL)		/* type error ? */
+		if (s2 == NULL)		// type error ?
 		{
 		    clear_tv(rettv);
 		    clear_tv(&var2);
@@ -2213,7 +2213,7 @@
 	    else if (op == '+' && rettv->v_type == VAR_LIST
 						   && var2.v_type == VAR_LIST)
 	    {
-		/* concatenate Lists */
+		// concatenate Lists
 		if (list_concat(rettv->vval.v_list, var2.vval.v_list,
 							       &var3) == FAIL)
 		{
@@ -2240,9 +2240,9 @@
 		    n1 = tv_get_number_chk(rettv, &error);
 		    if (error)
 		    {
-			/* This can only happen for "list + non-list".  For
-			 * "non-list + ..." or "something - ...", we returned
-			 * before evaluating the 2nd operand. */
+			// This can only happen for "list + non-list".  For
+			// "non-list + ..." or "something - ...", we returned
+			// before evaluating the 2nd operand.
 			clear_tv(rettv);
 			return FAIL;
 		    }
@@ -2275,7 +2275,7 @@
 		clear_tv(rettv);
 
 #ifdef FEAT_FLOAT
-		/* If there is a float on either side the result is a float. */
+		// If there is a float on either side the result is a float.
 		if (rettv->v_type == VAR_FLOAT || var2.v_type == VAR_FLOAT)
 		{
 		    if (op == '+')
@@ -2318,7 +2318,7 @@
     char_u	**arg,
     typval_T	*rettv,
     int		evaluate,
-    int		want_string)  /* after "." operator */
+    int		want_string)  // after "." operator
 {
     typval_T	var2;
     int		op;
@@ -2408,11 +2408,11 @@
 		else if (op == '/')
 		{
 # ifdef VMS
-		    /* VMS crashes on divide by zero, work around it */
+		    // VMS crashes on divide by zero, work around it
 		    if (f2 == 0.0)
 		    {
 			if (f1 == 0)
-			    f1 = -1 * __F_FLT_MAX - 1L;   /* similar to NaN */
+			    f1 = -1 * __F_FLT_MAX - 1L;   // similar to NaN
 			else if (f1 < 0)
 			    f1 = -1 * __F_FLT_MAX;
 			else
@@ -2421,8 +2421,8 @@
 		    else
 			f1 = f1 / f2;
 # else
-		    /* We rely on the floating point library to handle divide
-		     * by zero to result in "inf" and not a crash. */
+		    // We rely on the floating point library to handle divide
+		    // by zero to result in "inf" and not a crash.
 		    f1 = f1 / f2;
 # endif
 		}
@@ -2487,7 +2487,7 @@
     char_u	**arg,
     typval_T	*rettv,
     int		evaluate,
-    int		want_string UNUSED)	/* after "." operator */
+    int		want_string UNUSED)	// after "." operator
 {
     varnumber_T	n;
     int		len;
@@ -2542,13 +2542,13 @@
 		char_u *p;
 		int    get_float = FALSE;
 
-		/* We accept a float when the format matches
-		 * "[0-9]\+\.[0-9]\+\([eE][+-]\?[0-9]\+\)\?".  This is very
-		 * strict to avoid backwards compatibility problems.
-		 * With script version 2 and later the leading digit can be
-		 * omitted.
-		 * Don't look for a float after the "." operator, so that
-		 * ":let vers = 1.2.3" doesn't fail. */
+		// We accept a float when the format matches
+		// "[0-9]\+\.[0-9]\+\([eE][+-]\?[0-9]\+\)\?".  This is very
+		// strict to avoid backwards compatibility problems.
+		// With script version 2 and later the leading digit can be
+		// omitted.
+		// Don't look for a float after the "." operator, so that
+		// ":let vers = 1.2.3" doesn't fail.
 		if (**arg == '.')
 		    p = *arg;
 		else
@@ -2705,7 +2705,7 @@
      * nested expression: (expression).
      */
     case '(':	*arg = skipwhite(*arg + 1);
-		ret = eval1(arg, rettv, evaluate);	/* recursive! */
+		ret = eval1(arg, rettv, evaluate);	// recursive!
 		if (**arg == ')')
 		    ++*arg;
 		else if (ret == OK)
@@ -2735,7 +2735,7 @@
 	    ret = FAIL;
 	else
 	{
-	    if (**arg == '(')		/* recursive! */
+	    if (**arg == '(')		// recursive!
 		ret = eval_func(arg, s, len, rettv, evaluate, NULL);
 	    else if (evaluate)
 		ret = get_var_tv(s, len, rettv, NULL, TRUE, FALSE);
@@ -2750,8 +2750,8 @@
 
     *arg = skipwhite(*arg);
 
-    /* Handle following '[', '(' and '.' for expr[expr], expr.name,
-     * expr(expr), expr->name(expr) */
+    // Handle following '[', '(' and '.' for expr[expr], expr.name,
+    // expr(expr), expr->name(expr)
     if (ret == OK)
 	ret = handle_subscript(arg, rettv, evaluate, TRUE,
 						    start_leader, &end_leader);
@@ -2853,7 +2853,7 @@
 	functv = *rettv;
 	rettv->v_type = VAR_UNKNOWN;
 
-	/* Invoke the function.  Recursive! */
+	// Invoke the function.  Recursive!
 	if (functv.v_type == VAR_PARTIAL)
 	{
 	    pt = functv.vval.v_partial;
@@ -2874,8 +2874,8 @@
     funcexe.basetv = basetv;
     ret = get_func_tv(s, -1, rettv, arg, &funcexe);
 
-    /* Clear the funcref afterwards, so that deleting it while
-     * evaluating the arguments is possible (see test55). */
+    // Clear the funcref afterwards, so that deleting it while
+    // evaluating the arguments is possible (see test55).
     if (evaluate)
 	clear_tv(&functv);
 
@@ -2892,7 +2892,7 @@
     char_u	**arg,
     typval_T	*rettv,
     int		evaluate,
-    int		verbose)	/* give error messages */
+    int		verbose)	// give error messages
 {
     typval_T	base = *rettv;
     int		ret;
@@ -2937,7 +2937,7 @@
     char_u	**arg,
     typval_T	*rettv,
     int		evaluate,
-    int		verbose)	/* give error messages */
+    int		verbose)	// give error messages
 {
     char_u	*name;
     long	len;
@@ -2996,7 +2996,7 @@
     char_u	**arg,
     typval_T	*rettv,
     int		evaluate,
-    int		verbose)	/* give error messages */
+    int		verbose)	// give error messages
 {
     int		empty1 = FALSE, empty2 = FALSE;
     typval_T	var1, var2;
@@ -3029,7 +3029,7 @@
 	case VAR_UNKNOWN:
 	    if (evaluate)
 		return FAIL;
-	    /* FALLTHROUGH */
+	    // FALLTHROUGH
 
 	case VAR_STRING:
 	case VAR_NUMBER:
@@ -3063,11 +3063,11 @@
 	*arg = skipwhite(*arg + 1);
 	if (**arg == ':')
 	    empty1 = TRUE;
-	else if (eval1(arg, &var1, evaluate) == FAIL)	/* recursive! */
+	else if (eval1(arg, &var1, evaluate) == FAIL)	// recursive!
 	    return FAIL;
 	else if (evaluate && tv_get_string_chk(&var1) == NULL)
 	{
-	    /* not a number or string */
+	    // not a number or string
 	    clear_tv(&var1);
 	    return FAIL;
 	}
@@ -3081,7 +3081,7 @@
 	    *arg = skipwhite(*arg + 1);
 	    if (**arg == ']')
 		empty2 = TRUE;
-	    else if (eval1(arg, &var2, evaluate) == FAIL)	/* recursive! */
+	    else if (eval1(arg, &var2, evaluate) == FAIL)	// recursive!
 	    {
 		if (!empty1)
 		    clear_tv(&var1);
@@ -3089,7 +3089,7 @@
 	    }
 	    else if (evaluate && tv_get_string_chk(&var2) == NULL)
 	    {
-		/* not a number or string */
+		// not a number or string
 		if (!empty1)
 		    clear_tv(&var1);
 		clear_tv(&var2);
@@ -3097,7 +3097,7 @@
 	    }
 	}
 
-	/* Check for the ']'. */
+	// Check for the ']'.
 	if (**arg != ']')
 	{
 	    if (verbose)
@@ -3107,7 +3107,7 @@
 		clear_tv(&var2);
 	    return FAIL;
 	}
-	*arg = skipwhite(*arg + 1);	/* skip the ']' */
+	*arg = skipwhite(*arg + 1);	// skip the ']'
     }
 
     if (evaluate)
@@ -3138,7 +3138,7 @@
 	    case VAR_SPECIAL:
 	    case VAR_JOB:
 	    case VAR_CHANNEL:
-		break; /* not evaluating, skipping over subscript */
+		break; // not evaluating, skipping over subscript
 
 	    case VAR_NUMBER:
 	    case VAR_STRING:
@@ -3146,8 +3146,8 @@
 		len = (long)STRLEN(s);
 		if (range)
 		{
-		    /* The resulting variable is a substring.  If the indexes
-		     * are out of range the result is empty. */
+		    // The resulting variable is a substring.  If the indexes
+		    // are out of range the result is empty.
 		    if (n1 < 0)
 		    {
 			n1 = len + n1;
@@ -3165,9 +3165,9 @@
 		}
 		else
 		{
-		    /* The resulting variable is a string of a single
-		     * character.  If the index is too big or negative the
-		     * result is empty. */
+		    // The resulting variable is a string of a single
+		    // character.  If the index is too big or negative the
+		    // result is empty.
 		    if (n1 >= len || n1 < 0)
 			s = NULL;
 		    else
@@ -3246,8 +3246,8 @@
 		    n1 = len + n1;
 		if (!empty1 && (n1 < 0 || n1 >= len))
 		{
-		    /* For a range we allow invalid values and return an empty
-		     * list.  A list index out of range is an error. */
+		    // For a range we allow invalid values and return an empty
+		    // list.  A list index out of range is an error.
 		    if (!range)
 		    {
 			if (verbose)
@@ -3342,7 +3342,7 @@
     int
 get_option_tv(
     char_u	**arg,
-    typval_T	*rettv,	/* when NULL, only check if option exists */
+    typval_T	*rettv,	// when NULL, only check if option exists
     int		evaluate)
 {
     char_u	*option_end;
@@ -3350,7 +3350,7 @@
     char_u	*stringval;
     int		opt_type;
     int		c;
-    int		working = (**arg == '+');    /* has("+option") */
+    int		working = (**arg == '+');    // has("+option")
     int		ret = OK;
     int		opt_flags;
 
@@ -3376,7 +3376,7 @@
     opt_type = get_option_value(*arg, &numval,
 			       rettv == NULL ? NULL : &stringval, opt_flags);
 
-    if (opt_type == -3)			/* invalid name */
+    if (opt_type == -3)			// invalid name
     {
 	if (rettv != NULL)
 	    semsg(_("E113: Unknown option: %s"), *arg);
@@ -3384,22 +3384,22 @@
     }
     else if (rettv != NULL)
     {
-	if (opt_type == -2)		/* hidden string option */
+	if (opt_type == -2)		// hidden string option
 	{
 	    rettv->v_type = VAR_STRING;
 	    rettv->vval.v_string = NULL;
 	}
-	else if (opt_type == -1)	/* hidden number option */
+	else if (opt_type == -1)	// hidden number option
 	{
 	    rettv->v_type = VAR_NUMBER;
 	    rettv->vval.v_number = 0;
 	}
-	else if (opt_type == 1)		/* number option */
+	else if (opt_type == 1)		// number option
 	{
 	    rettv->v_type = VAR_NUMBER;
 	    rettv->vval.v_number = numval;
 	}
-	else				/* string option */
+	else				// string option
 	{
 	    rettv->v_type = VAR_STRING;
 	    rettv->vval.v_string = stringval;
@@ -3408,7 +3408,7 @@
     else if (working && (opt_type == -2 || opt_type == -1))
 	ret = FAIL;
 
-    *option_end = c;		    /* put back for error messages */
+    *option_end = c;		    // put back for error messages
     *arg = option_end;
 
     return ret;
@@ -3433,8 +3433,8 @@
 	if (*p == '\\' && p[1] != NUL)
 	{
 	    ++p;
-	    /* A "\<x>" form occupies at least 4 characters, and produces up
-	     * to 6 characters: reserve space for 2 extra */
+	    // A "\<x>" form occupies at least 4 characters, and produces up
+	    // to 6 characters: reserve space for 2 extra
 	    if (*p == '<')
 		extra += 2;
 	}
@@ -3446,7 +3446,7 @@
 	return FAIL;
     }
 
-    /* If only parsing, set *arg and return here */
+    // If only parsing, set *arg and return here
     if (!evaluate)
     {
 	*arg = p + 1;
@@ -3476,9 +3476,9 @@
 		case 'r': *name++ = CAR; ++p; break;
 		case 't': *name++ = TAB; ++p; break;
 
-		case 'X': /* hex: "\x1", "\x12" */
+		case 'X': // hex: "\x1", "\x12"
 		case 'x':
-		case 'u': /* Unicode: "\u0023" */
+		case 'u': // Unicode: "\u0023"
 		case 'U':
 			  if (vim_isxdigit(p[1]))
 			  {
@@ -3498,8 +3498,8 @@
 				  nr = (nr << 4) + hex2nr(*p);
 			      }
 			      ++p;
-			      /* For "\u" store the number according to
-			       * 'encoding'. */
+			      // For "\u" store the number according to
+			      // 'encoding'.
 			      if (c != 'X')
 				  name += (*mb_char2bytes)(nr, name);
 			      else
@@ -3507,7 +3507,7 @@
 			  }
 			  break;
 
-			  /* octal: "\1", "\12", "\123" */
+			  // octal: "\1", "\12", "\123"
 		case '0':
 		case '1':
 		case '2':
@@ -3525,7 +3525,7 @@
 			  ++name;
 			  break;
 
-			    /* Special key, e.g.: "\<C-W>" */
+			    // Special key, e.g.: "\<C-W>"
 		case '<': extra = trans_special(&p, name, TRUE, TRUE,
 								   TRUE, NULL);
 			  if (extra != 0)
@@ -3533,7 +3533,7 @@
 			      name += extra;
 			      break;
 			  }
-			  /* FALLTHROUGH */
+			  // FALLTHROUGH
 
 		default:  MB_COPY_CHAR(p, name);
 			  break;
@@ -3544,7 +3544,7 @@
 
     }
     *name = NUL;
-    if (*p != NUL) /* just in case */
+    if (*p != NUL) // just in case
 	++p;
     *arg = p;
 
@@ -3582,7 +3582,7 @@
 	return FAIL;
     }
 
-    /* If only parsing return after setting "*arg" */
+    // If only parsing return after setting "*arg"
     if (!evaluate)
     {
 	*arg = p + 1;
@@ -3661,14 +3661,14 @@
 func_equal(
     typval_T *tv1,
     typval_T *tv2,
-    int	     ic)	    /* ignore case */
+    int	     ic)	    // ignore case
 {
     char_u	*s1, *s2;
     dict_T	*d1, *d2;
     int		a1, a2;
     int		i;
 
-    /* empty and NULL function name considered the same */
+    // empty and NULL function name considered the same
     s1 = tv1->v_type == VAR_FUNC ? tv1->vval.v_string
 					   : partial_name(tv1->vval.v_partial);
     if (s1 != NULL && *s1 == NUL)
@@ -3685,7 +3685,7 @@
     else if (STRCMP(s1, s2) != 0)
 	return FALSE;
 
-    /* empty dict and NULL dict is different */
+    // empty dict and NULL dict is different
     d1 = tv1->v_type == VAR_FUNC ? NULL : tv1->vval.v_partial->pt_dict;
     d2 = tv2->v_type == VAR_FUNC ? NULL : tv2->vval.v_partial->pt_dict;
     if (d1 == NULL || d2 == NULL)
@@ -3696,7 +3696,7 @@
     else if (!dict_equal(d1, d2, ic, TRUE))
 	return FALSE;
 
-    /* empty list and no list considered the same */
+    // empty list and no list considered the same
     a1 = tv1->v_type == VAR_FUNC ? 0 : tv1->vval.v_partial->pt_argc;
     a2 = tv2->v_type == VAR_FUNC ? 0 : tv2->vval.v_partial->pt_argc;
     if (a1 != a2)
@@ -3718,20 +3718,20 @@
 tv_equal(
     typval_T *tv1,
     typval_T *tv2,
-    int	     ic,	    /* ignore case */
-    int	     recursive)	    /* TRUE when used recursively */
+    int	     ic,	    // ignore case
+    int	     recursive)	    // TRUE when used recursively
 {
     char_u	buf1[NUMBUFLEN], buf2[NUMBUFLEN];
     char_u	*s1, *s2;
-    static int  recursive_cnt = 0;	    /* catch recursive loops */
+    static int  recursive_cnt = 0;	    // catch recursive loops
     int		r;
 
-    /* Catch lists and dicts that have an endless loop by limiting
-     * recursiveness to a limit.  We guess they are equal then.
-     * A fixed limit has the problem of still taking an awful long time.
-     * Reduce the limit every time running into it. That should work fine for
-     * deeply linked structures that are not recursively linked and catch
-     * recursiveness quickly. */
+    // Catch lists and dicts that have an endless loop by limiting
+    // recursiveness to a limit.  We guess they are equal then.
+    // A fixed limit has the problem of still taking an awful long time.
+    // Reduce the limit every time running into it. That should work fine for
+    // deeply linked structures that are not recursively linked and catch
+    // recursiveness quickly.
     if (!recursive)
 	tv_equal_recurse_limit = 1000;
     if (recursive_cnt >= tv_equal_recurse_limit)
@@ -3740,8 +3740,8 @@
 	return TRUE;
     }
 
-    /* For VAR_FUNC and VAR_PARTIAL compare the function name, bound dict and
-     * arguments. */
+    // For VAR_FUNC and VAR_PARTIAL compare the function name, bound dict and
+    // arguments.
     if ((tv1->v_type == VAR_FUNC
 		|| (tv1->v_type == VAR_PARTIAL && tv1->vval.v_partial != NULL))
 	    && (tv2->v_type == VAR_FUNC
@@ -3802,8 +3802,8 @@
 	    break;
     }
 
-    /* VAR_UNKNOWN can be the result of a invalid expression, let's say it
-     * does not equal anything, not even itself. */
+    // VAR_UNKNOWN can be the result of a invalid expression, let's say it
+    // does not equal anything, not even itself.
     return FALSE;
 }
 
@@ -3855,14 +3855,14 @@
 
     if (!testing)
     {
-	/* Only do this once. */
+	// Only do this once.
 	want_garbage_collect = FALSE;
 	may_garbage_collect = FALSE;
 	garbage_collect_at_exit = FALSE;
     }
 
-    /* We advance by two because we add one for items referenced through
-     * previous_funccal. */
+    // We advance by two because we add one for items referenced through
+    // previous_funccal.
     copyID = get_copyID();
 
     /*
@@ -3870,20 +3870,20 @@
      *    with copyID.
      */
 
-    /* Don't free variables in the previous_funccal list unless they are only
-     * referenced through previous_funccal.  This must be first, because if
-     * the item is referenced elsewhere the funccal must not be freed. */
+    // Don't free variables in the previous_funccal list unless they are only
+    // referenced through previous_funccal.  This must be first, because if
+    // the item is referenced elsewhere the funccal must not be freed.
     abort = abort || set_ref_in_previous_funccal(copyID);
 
-    /* script-local variables */
+    // script-local variables
     abort = abort || garbage_collect_scriptvars(copyID);
 
-    /* buffer-local variables */
+    // buffer-local variables
     FOR_ALL_BUFFERS(buf)
 	abort = abort || set_ref_in_item(&buf->b_bufvar.di_tv, copyID,
 								  NULL, NULL);
 
-    /* window-local variables */
+    // window-local variables
     FOR_ALL_TAB_WINDOWS(tp, wp)
 	abort = abort || set_ref_in_item(&wp->w_winvar.di_tv, copyID,
 								  NULL, NULL);
@@ -3900,23 +3900,23 @@
 								  NULL, NULL);
 #endif
 
-    /* tabpage-local variables */
+    // tabpage-local variables
     FOR_ALL_TABPAGES(tp)
 	abort = abort || set_ref_in_item(&tp->tp_winvar.di_tv, copyID,
 								  NULL, NULL);
-    /* global variables */
+    // global variables
     abort = abort || garbage_collect_globvars(copyID);
 
-    /* function-local variables */
+    // function-local variables
     abort = abort || set_ref_in_call_stack(copyID);
 
-    /* named functions (matters for closures) */
+    // named functions (matters for closures)
     abort = abort || set_ref_in_functions(copyID);
 
-    /* function call arguments, if v:testing is set. */
+    // function call arguments, if v:testing is set.
     abort = abort || set_ref_in_func_args(copyID);
 
-    /* v: vars */
+    // v: vars
     abort = abort || garbage_collect_vimvars(copyID);
 
     // callbacks in buffers
@@ -3987,9 +3987,9 @@
 {
     int		did_free = FALSE;
 
-    /* Let all "free" functions know that we are here.  This means no
-     * dictionaries, lists, channels or jobs are to be freed, because we will
-     * do that here. */
+    // Let all "free" functions know that we are here.  This means no
+    // dictionaries, lists, channels or jobs are to be freed, because we will
+    // do that here.
     in_free_unref_items = TRUE;
 
     /*
@@ -3997,19 +3997,19 @@
      * themselves yet, so that it is possible to decrement refcount counters
      */
 
-    /* Go through the list of dicts and free items without the copyID. */
+    // Go through the list of dicts and free items without the copyID.
     did_free |= dict_free_nonref(copyID);
 
-    /* Go through the list of lists and free items without the copyID. */
+    // Go through the list of lists and free items without the copyID.
     did_free |= list_free_nonref(copyID);
 
 #ifdef FEAT_JOB_CHANNEL
-    /* Go through the list of jobs and free items without the copyID. This
-     * must happen before doing channels, because jobs refer to channels, but
-     * the reference from the channel to the job isn't tracked. */
+    // Go through the list of jobs and free items without the copyID. This
+    // must happen before doing channels, because jobs refer to channels, but
+    // the reference from the channel to the job isn't tracked.
     did_free |= free_unused_jobs_contents(copyID, COPYID_MASK);
 
-    /* Go through the list of channels and free items without the copyID.  */
+    // Go through the list of channels and free items without the copyID.
     did_free |= free_unused_channels_contents(copyID, COPYID_MASK);
 #endif
 
@@ -4020,12 +4020,12 @@
     list_free_items(copyID);
 
 #ifdef FEAT_JOB_CHANNEL
-    /* Go through the list of jobs and free items without the copyID. This
-     * must happen before doing channels, because jobs refer to channels, but
-     * the reference from the channel to the job isn't tracked. */
+    // Go through the list of jobs and free items without the copyID. This
+    // must happen before doing channels, because jobs refer to channels, but
+    // the reference from the channel to the job isn't tracked.
     free_unused_jobs(copyID, COPYID_MASK);
 
-    /* Go through the list of channels and free items without the copyID.  */
+    // Go through the list of channels and free items without the copyID.
     free_unused_channels(copyID, COPYID_MASK);
 #endif
 
@@ -4055,9 +4055,9 @@
     {
 	if (!abort)
 	{
-	    /* Mark each item in the hashtab.  If the item contains a hashtab
-	     * it is added to ht_stack, if it contains a list it is added to
-	     * list_stack. */
+	    // Mark each item in the hashtab.  If the item contains a hashtab
+	    // it is added to ht_stack, if it contains a list it is added to
+	    // list_stack.
 	    todo = (int)cur_ht->ht_used;
 	    for (hi = cur_ht->ht_array; todo > 0; ++hi)
 		if (!HASHITEM_EMPTY(hi))
@@ -4071,7 +4071,7 @@
 	if (ht_stack == NULL)
 	    break;
 
-	/* take an item from the stack */
+	// take an item from the stack
 	cur_ht = ht_stack->ht;
 	tempitem = ht_stack;
 	ht_stack = ht_stack->prev;
@@ -4130,16 +4130,16 @@
     for (;;)
     {
 	if (!abort)
-	    /* Mark each item in the list.  If the item contains a hashtab
-	     * it is added to ht_stack, if it contains a list it is added to
-	     * list_stack. */
+	    // Mark each item in the list.  If the item contains a hashtab
+	    // it is added to ht_stack, if it contains a list it is added to
+	    // list_stack.
 	    for (li = cur_l->lv_first; !abort && li != NULL; li = li->li_next)
 		abort = abort || set_ref_in_item(&li->li_tv, copyID,
 						       ht_stack, &list_stack);
 	if (list_stack == NULL)
 	    break;
 
-	/* take an item from the stack */
+	// take an item from the stack
 	cur_l = list_stack->list;
 	tempitem = list_stack;
 	list_stack = list_stack->prev;
@@ -4171,7 +4171,7 @@
 
 	if (dd != NULL && dd->dv_copyID != copyID)
 	{
-	    /* Didn't see this dict yet. */
+	    // Didn't see this dict yet.
 	    dd->dv_copyID = copyID;
 	    if (ht_stack == NULL)
 	    {
@@ -4197,7 +4197,7 @@
 
 	if (ll != NULL && ll->lv_copyID != copyID)
 	{
-	    /* Didn't see this list yet. */
+	    // Didn't see this list yet.
 	    ll->lv_copyID = copyID;
 	    if (list_stack == NULL)
 	    {
@@ -4227,8 +4227,7 @@
 	partial_T	*pt = tv->vval.v_partial;
 	int		i;
 
-	/* A partial does not have a copyID, because it cannot contain itself.
-	 */
+	// A partial does not have a copyID, because it cannot contain itself.
 	if (pt != NULL)
 	{
 	    abort = set_ref_in_func(pt->pt_name, pt->pt_func, copyID);
@@ -4349,9 +4348,9 @@
     {
 	if (!did_echo_string_emsg)
 	{
-	    /* Only give this message once for a recursive call to avoid
-	     * flooding the user with errors.  And stop iterating over lists
-	     * and dicts. */
+	    // Only give this message once for a recursive call to avoid
+	    // flooding the user with errors.  And stop iterating over lists
+	    // and dicts.
 	    did_echo_string_emsg = TRUE;
 	    emsg(_("E724: variable nested too deep for displaying"));
 	}
@@ -4612,12 +4611,12 @@
     int
 string2float(
     char_u	*text,
-    float_T	*value)	    /* result stored here */
+    float_T	*value)	    // result stored here
 {
     char	*s = (char *)text;
     float_T	f;
 
-    /* MS-Windows does not deal with "inf" and "nan" properly. */
+    // MS-Windows does not deal with "inf" and "nan" properly.
     if (STRNICMP(text, "inf", 3) == 0)
     {
 	*value = INFINITY;
@@ -4660,11 +4659,11 @@
     if (evaluate)
     {
 	if (len == 0)
-	    return FAIL; /* invalid empty name */
+	    return FAIL; // invalid empty name
 
 	cc = name[len];
 	name[len] = NUL;
-	/* first try vim_getenv(), fast for normal environment vars */
+	// first try vim_getenv(), fast for normal environment vars
 	string = vim_getenv(name, &mustfree);
 	if (string != NULL && *string != NUL)
 	{
@@ -4676,7 +4675,7 @@
 	    if (mustfree)
 		vim_free(string);
 
-	    /* next try expanding things like $VIM and ${HOME} */
+	    // next try expanding things like $VIM and ${HOME}
 	    string = expand_env_save(name - 1);
 	    if (string != NULL && *string == '$')
 		VIM_CLEAR(string);
@@ -4697,14 +4696,14 @@
     pos_T *
 var2fpos(
     typval_T	*varp,
-    int		dollar_lnum,	/* TRUE when $ is last line */
-    int		*fnum)		/* set to fnum for '0, 'A, etc. */
+    int		dollar_lnum,	// TRUE when $ is last line
+    int		*fnum)		// set to fnum for '0, 'A, etc.
 {
     char_u		*name;
     static pos_T	pos;
     pos_T		*pp;
 
-    /* Argument can be [lnum, col, coladd]. */
+    // Argument can be [lnum, col, coladd].
     if (varp->v_type == VAR_LIST)
     {
 	list_T		*l;
@@ -4716,30 +4715,30 @@
 	if (l == NULL)
 	    return NULL;
 
-	/* Get the line number */
+	// Get the line number
 	pos.lnum = list_find_nr(l, 0L, &error);
 	if (error || pos.lnum <= 0 || pos.lnum > curbuf->b_ml.ml_line_count)
-	    return NULL;	/* invalid line number */
+	    return NULL;	// invalid line number
 
-	/* Get the column number */
+	// Get the column number
 	pos.col = list_find_nr(l, 1L, &error);
 	if (error)
 	    return NULL;
 	len = (long)STRLEN(ml_get(pos.lnum));
 
-	/* We accept "$" for the column number: last column. */
+	// We accept "$" for the column number: last column.
 	li = list_find(l, 1L);
 	if (li != NULL && li->li_tv.v_type == VAR_STRING
 		&& li->li_tv.vval.v_string != NULL
 		&& STRCMP(li->li_tv.vval.v_string, "$") == 0)
 	    pos.col = len + 1;
 
-	/* Accept a position up to the NUL after the line. */
+	// Accept a position up to the NUL after the line.
 	if (pos.col == 0 || (int)pos.col > len + 1)
-	    return NULL;	/* invalid column number */
+	    return NULL;	// invalid column number
 	--pos.col;
 
-	/* Get the virtual offset.  Defaults to zero. */
+	// Get the virtual offset.  Defaults to zero.
 	pos.coladd = list_find_nr(l, 2L, &error);
 	if (error)
 	    pos.coladd = 0;
@@ -4750,15 +4749,15 @@
     name = tv_get_string_chk(varp);
     if (name == NULL)
 	return NULL;
-    if (name[0] == '.')				/* cursor */
+    if (name[0] == '.')				// cursor
 	return &curwin->w_cursor;
-    if (name[0] == 'v' && name[1] == NUL)	/* Visual start */
+    if (name[0] == 'v' && name[1] == NUL)	// Visual start
     {
 	if (VIsual_active)
 	    return &VIsual;
 	return &curwin->w_cursor;
     }
-    if (name[0] == '\'')			/* mark */
+    if (name[0] == '\'')			// mark
     {
 	pp = getmark_buf_fnum(curbuf, name[1], FALSE, fnum);
 	if (pp == NULL || pp == (pos_T *)-1 || pp->lnum <= 0)
@@ -4771,23 +4770,23 @@
     if (name[0] == 'w' && dollar_lnum)
     {
 	pos.col = 0;
-	if (name[1] == '0')		/* "w0": first visible line */
+	if (name[1] == '0')		// "w0": first visible line
 	{
 	    update_topline();
-	    /* In silent Ex mode topline is zero, but that's not a valid line
-	     * number; use one instead. */
+	    // In silent Ex mode topline is zero, but that's not a valid line
+	    // number; use one instead.
 	    pos.lnum = curwin->w_topline > 0 ? curwin->w_topline : 1;
 	    return &pos;
 	}
-	else if (name[1] == '$')	/* "w$": last visible line */
+	else if (name[1] == '$')	// "w$": last visible line
 	{
 	    validate_botline();
-	    /* In silent Ex mode botline is zero, return zero then. */
+	    // In silent Ex mode botline is zero, return zero then.
 	    pos.lnum = curwin->w_botline > 0 ? curwin->w_botline - 1 : 0;
 	    return &pos;
 	}
     }
-    else if (name[0] == '$')		/* last column or line */
+    else if (name[0] == '$')		// last column or line
     {
 	if (dollar_lnum)
 	{
@@ -4823,8 +4822,8 @@
     long	i = 0;
     long	n;
 
-    /* List must be: [fnum, lnum, col, coladd, curswant], where "fnum" is only
-     * there when "fnump" isn't NULL; "coladd" and "curswant" are optional. */
+    // List must be: [fnum, lnum, col, coladd, curswant], where "fnum" is only
+    // there when "fnump" isn't NULL; "coladd" and "curswant" are optional.
     if (arg->v_type != VAR_LIST
 	    || l == NULL
 	    || l->lv_len < (fnump == NULL ? 2 : 3)
@@ -4833,32 +4832,32 @@
 
     if (fnump != NULL)
     {
-	n = list_find_nr(l, i++, NULL);	/* fnum */
+	n = list_find_nr(l, i++, NULL);	// fnum
 	if (n < 0)
 	    return FAIL;
 	if (n == 0)
-	    n = curbuf->b_fnum;		/* current buffer */
+	    n = curbuf->b_fnum;		// current buffer
 	*fnump = n;
     }
 
-    n = list_find_nr(l, i++, NULL);	/* lnum */
+    n = list_find_nr(l, i++, NULL);	// lnum
     if (n < 0)
 	return FAIL;
     posp->lnum = n;
 
-    n = list_find_nr(l, i++, NULL);	/* col */
+    n = list_find_nr(l, i++, NULL);	// col
     if (n < 0)
 	return FAIL;
     posp->col = n;
 
-    n = list_find_nr(l, i, NULL);	/* off */
+    n = list_find_nr(l, i, NULL);	// off
     if (n < 0)
 	posp->coladd = 0;
     else
 	posp->coladd = n;
 
     if (curswantp != NULL)
-	*curswantp = list_find_nr(l, i + 1, NULL);  /* curswant */
+	*curswantp = list_find_nr(l, i + 1, NULL);  // curswant
 
     return OK;
 }
@@ -4876,7 +4875,7 @@
 
     for (p = *arg; vim_isIDc(*p); ++p)
 	;
-    if (p == *arg)	    /* no name found */
+    if (p == *arg)	    // no name found
 	return 0;
 
     len = (int)(p - *arg);
@@ -4895,20 +4894,20 @@
     char_u	*p;
     int		len;
 
-    /* Find the end of the name. */
+    // Find the end of the name.
     for (p = *arg; eval_isnamec(*p); ++p)
     {
 	if (*p == ':')
 	{
-	    /* "s:" is start of "s:var", but "n:" is not and can be used in
-	     * slice "[n:]".  Also "xx:" is not a namespace. */
+	    // "s:" is start of "s:var", but "n:" is not and can be used in
+	    // slice "[n:]".  Also "xx:" is not a namespace.
 	    len = (int)(p - *arg);
 	    if ((len == 1 && vim_strchr(NAMESPACE_CHAR, **arg) == NULL)
 		    || len > 1)
 		break;
 	}
     }
-    if (p == *arg)	    /* no name found */
+    if (p == *arg)	    // no name found
 	return 0;
 
     len = (int)(p - *arg);
@@ -4938,19 +4937,19 @@
     char_u	*expr_start;
     char_u	*expr_end;
 
-    *alias = NULL;  /* default to no alias */
+    *alias = NULL;  // default to no alias
 
     if ((*arg)[0] == K_SPECIAL && (*arg)[1] == KS_EXTRA
 						  && (*arg)[2] == (int)KE_SNR)
     {
-	/* hard coded <SNR>, already translated */
+	// hard coded <SNR>, already translated
 	*arg += 3;
 	return get_id_len(arg) + 3;
     }
     len = eval_fname_script(*arg);
     if (len > 0)
     {
-	/* literal "<SID>", "s:" or "<SNR>" */
+	// literal "<SID>", "s:" or "<SNR>"
 	*arg += len;
     }
 
@@ -5017,7 +5016,7 @@
 	*expr_end = NULL;
     }
 
-    /* Quick check for valid starting character. */
+    // Quick check for valid starting character.
     if ((flags & FNE_CHECK_START) && !eval_isnamec1(*arg) && *arg != '{')
 	return arg;
 
@@ -5030,7 +5029,7 @@
     {
 	if (*p == '\'')
 	{
-	    /* skip over 'string' to avoid counting [ and ] inside it. */
+	    // skip over 'string' to avoid counting [ and ] inside it.
 	    for (p = p + 1; *p != NUL && *p != '\''; MB_PTR_ADV(p))
 		;
 	    if (*p == NUL)
@@ -5038,7 +5037,7 @@
 	}
 	else if (*p == '"')
 	{
-	    /* skip over "str\"ing" to avoid counting [ and ] inside it. */
+	    // skip over "str\"ing" to avoid counting [ and ] inside it.
 	    for (p = p + 1; *p != NUL && *p != '"'; MB_PTR_ADV(p))
 		if (*p == '\\' && p[1] != NUL)
 		    ++p;
@@ -5047,8 +5046,8 @@
 	}
 	else if (br_nest == 0 && mb_nest == 0 && *p == ':')
 	{
-	    /* "s:" is start of "s:var", but "n:" is not and can be used in
-	     * slice "[n:]".  Also "xx:" is not a namespace. But {ns}: is. */
+	    // "s:" is start of "s:var", but "n:" is not and can be used in
+	    // slice "[n:]".  Also "xx:" is not a namespace. But {ns}: is.
 	    len = (int)(p - arg);
 	    if ((len == 1 && vim_strchr(NAMESPACE_CHAR, *arg) == NULL)
 		    || (len > 1 && p[-1] != '}'))
@@ -5129,7 +5128,7 @@
     }
     vim_free(temp_result);
 
-    *in_end = c1;		/* put char back for error messages */
+    *in_end = c1;		// put char back for error messages
     *expr_start = '{';
     *expr_end = '}';
 
@@ -5138,7 +5137,7 @@
 	temp_result = find_name_end(retval, &expr_start, &expr_end, 0);
 	if (expr_start != NULL)
 	{
-	    /* Further expansion! */
+	    // Further expansion!
 	    temp_result = make_expanded_name(retval, expr_start,
 						       expr_end, temp_result);
 	    vim_free(retval);
@@ -5235,7 +5234,7 @@
 		    ret = eval_method(arg, rettv, evaluate, verbose);
 	    }
 	}
-	else /* **arg == '[' || **arg == '.' */
+	else // **arg == '[' || **arg == '.'
 	{
 	    dict_unref(selfdict);
 	    if (rettv->v_type == VAR_DICT)
@@ -5254,9 +5253,9 @@
 	}
     }
 
-    /* Turn "dict.Func" into a partial for "Func" bound to "dict".
-     * Don't do this when "Func" is already a partial that was bound
-     * explicitly (pt_auto is FALSE). */
+    // Turn "dict.Func" into a partial for "Func" bound to "dict".
+    // Don't do this when "Func" is already a partial that was bound
+    // explicitly (pt_auto is FALSE).
     if (selfdict != NULL
 	    && (rettv->v_type == VAR_FUNC
 		|| (rettv->v_type == VAR_PARTIAL
@@ -5311,7 +5310,7 @@
 	{
 	    case VAR_FUNC:
 		func_unref(varp->vval.v_string);
-		/* FALLTHROUGH */
+		// FALLTHROUGH
 	    case VAR_STRING:
 		vim_free(varp->vval.v_string);
 		break;
@@ -5359,7 +5358,7 @@
 	{
 	    case VAR_FUNC:
 		func_unref(varp->vval.v_string);
-		/* FALLTHROUGH */
+		// FALLTHROUGH
 	    case VAR_STRING:
 		VIM_CLEAR(varp->vval.v_string);
 		break;
@@ -5429,7 +5428,7 @@
 {
     int		error = FALSE;
 
-    return tv_get_number_chk(varp, &error);	/* return 0L on error */
+    return tv_get_number_chk(varp, &error);	// return 0L on error
 }
 
     varnumber_T
@@ -5481,7 +5480,7 @@
 	    internal_error("tv_get_number(UNKNOWN)");
 	    break;
     }
-    if (denote == NULL)		/* useful for values that must be unsigned */
+    if (denote == NULL)		// useful for values that must be unsigned
 	n = -1;
     else
 	*denote = TRUE;
@@ -5626,7 +5625,7 @@
 			    (long)job->jv_proc_info.dwProcessId,
 			    status);
 # else
-		/* fall-back */
+		// fall-back
 		vim_snprintf((char *)buf, NUMBUFLEN, "process ? %s", status);
 # endif
 		return buf;
@@ -5843,7 +5842,7 @@
 		to->vval.v_list = NULL;
 	    else if (copyID != 0 && from->vval.v_list->lv_copyID == copyID)
 	    {
-		/* use the copy made earlier */
+		// use the copy made earlier
 		to->vval.v_list = from->vval.v_list->lv_copylist;
 		++to->vval.v_list->lv_refcount;
 	    }
@@ -5862,7 +5861,7 @@
 		to->vval.v_dict = NULL;
 	    else if (copyID != 0 && from->vval.v_dict->dv_copyID == copyID)
 	    {
-		/* use the copy made earlier */
+		// use the copy made earlier
 		to->vval.v_dict = from->vval.v_dict->dv_copydict;
 		++to->vval.v_dict->dv_refcount;
 	    }
@@ -5901,8 +5900,8 @@
 	++emsg_skip;
     while (*arg != NUL && *arg != '|' && *arg != '\n' && !got_int)
     {
-	/* If eval1() causes an error message the text from the command may
-	 * still need to be cleared. E.g., "echo 22,44". */
+	// If eval1() causes an error message the text from the command may
+	// still need to be cleared. E.g., "echo 22,44".
 	need_clr_eos = needclr;
 
 	p = arg;
@@ -5926,13 +5925,13 @@
 	    if (atstart)
 	    {
 		atstart = FALSE;
-		/* Call msg_start() after eval1(), evaluating the expression
-		 * may cause a message to appear. */
+		// Call msg_start() after eval1(), evaluating the expression
+		// may cause a message to appear.
 		if (eap->cmdidx == CMD_echo)
 		{
-		    /* Mark the saved text as finishing the line, so that what
-		     * follows is displayed on a new line when scrolling back
-		     * at the more prompt. */
+		    // Mark the saved text as finishing the line, so that what
+		    // follows is displayed on a new line when scrolling back
+		    // at the more prompt.
 		    msg_sb_eol();
 		    msg_start();
 		}
@@ -5947,7 +5946,7 @@
 		    {
 			if (*p != TAB && needclr)
 			{
-			    /* remove any text still there from the command */
+			    // remove any text still there from the command
 			    msg_clr_eos();
 			    needclr = FALSE;
 			}
@@ -5977,7 +5976,7 @@
 	--emsg_skip;
     else
     {
-	/* remove text that may still be there from the command */
+	// remove text that may still be there from the command
 	if (needclr)
 	    msg_clr_eos();
 	if (eap->cmdidx == CMD_echo)
@@ -6060,9 +6059,9 @@
     {
 	if (eap->cmdidx == CMD_echomsg || eap->cmdidx == CMD_echoerr)
 	{
-	    /* Mark the already saved text as finishing the line, so that what
-	     * follows is displayed on a new line when scrolling back at the
-	     * more prompt. */
+	    // Mark the already saved text as finishing the line, so that what
+	    // follows is displayed on a new line when scrolling back at the
+	    // more prompt.
 	    msg_sb_eol();
 	}
 
@@ -6073,7 +6072,7 @@
 	}
 	else if (eap->cmdidx == CMD_echoerr)
 	{
-	    /* We don't want to abort following commands, restore did_emsg. */
+	    // We don't want to abort following commands, restore did_emsg.
 	    save_did_emsg = did_emsg;
 	    emsg(ga.ga_data);
 	    if (!force_abort)
@@ -6122,7 +6121,7 @@
     *arg = p;
 
     if (p[0] == 't' && p[1] == '_' && p[2] != NUL && p[3] != NUL)
-	p += 4;	    /* termcap option */
+	p += 4;	    // termcap option
     else
 	while (ASCII_ISALPHA(*p))
 	    ++p;
@@ -6162,11 +6161,11 @@
  */
     int
 typval_compare(
-    typval_T	*typ1,   /* first operand */
-    typval_T	*typ2,   /* second operand */
-    exptype_T	type,    /* operator */
-    int		type_is, /* TRUE for "is" and "isnot" */
-    int		ic)      /* ignore case */
+    typval_T	*typ1,   // first operand
+    typval_T	*typ2,   // second operand
+    exptype_T	type,    // operator
+    int		type_is, // TRUE for "is" and "isnot"
+    int		ic)      // ignore case
 {
     int		i;
     varnumber_T	n1, n2;
@@ -6175,8 +6174,8 @@
 
     if (type_is && typ1->v_type != typ2->v_type)
     {
-	/* For "is" a different type always means FALSE, for "notis"
-	    * it means TRUE. */
+	// For "is" a different type always means FALSE, for "notis"
+	// it means TRUE.
 	n1 = (type == TYPE_NEQUAL);
     }
     else if (typ1->v_type == VAR_BLOB || typ2->v_type == VAR_BLOB)
@@ -6227,7 +6226,7 @@
 	}
 	else
 	{
-	    /* Compare two Lists for being equal or unequal. */
+	    // Compare two Lists for being equal or unequal.
 	    n1 = list_equal(typ1->vval.v_list, typ2->vval.v_list,
 							    ic, FALSE);
 	    if (type == TYPE_NEQUAL)
@@ -6256,7 +6255,7 @@
 	}
 	else
 	{
-	    /* Compare two Dictionaries for being equal or unequal. */
+	    // Compare two Dictionaries for being equal or unequal.
 	    n1 = dict_equal(typ1->vval.v_dict, typ2->vval.v_dict,
 							    ic, FALSE);
 	    if (type == TYPE_NEQUAL)
@@ -6277,13 +6276,13 @@
 					&& typ1->vval.v_partial == NULL)
 		|| (typ2->v_type == VAR_PARTIAL
 					&& typ2->vval.v_partial == NULL))
-	    /* when a partial is NULL assume not equal */
+	    // when a partial is NULL assume not equal
 	    n1 = FALSE;
 	else if (type_is)
 	{
 	    if (typ1->v_type == VAR_FUNC && typ2->v_type == VAR_FUNC)
-		/* strings are considered the same if their value is
-		    * the same */
+		// strings are considered the same if their value is
+		// the same
 		n1 = tv_equal(typ1, typ2, ic, FALSE);
 	    else if (typ1->v_type == VAR_PARTIAL
 					&& typ2->v_type == VAR_PARTIAL)
@@ -6320,7 +6319,7 @@
 	    case TYPE_SEQUAL:   n1 = (f1 <= f2); break;
 	    case TYPE_UNKNOWN:
 	    case TYPE_MATCH:
-	    case TYPE_NOMATCH:  break;  /* avoid gcc warning */
+	    case TYPE_NOMATCH:  break;  // avoid gcc warning
 	}
     }
 #endif
@@ -6344,7 +6343,7 @@
 	    case TYPE_SEQUAL:   n1 = (n1 <= n2); break;
 	    case TYPE_UNKNOWN:
 	    case TYPE_MATCH:
-	    case TYPE_NOMATCH:  break;  /* avoid gcc warning */
+	    case TYPE_NOMATCH:  break;  // avoid gcc warning
 	}
     }
     else
@@ -6372,7 +6371,7 @@
 			n1 = !n1;
 		    break;
 
-	    case TYPE_UNKNOWN:  break;  /* avoid gcc warning */
+	    case TYPE_UNKNOWN:  break;  // avoid gcc warning
 	}
     }
     clear_tv(typ1);
@@ -6392,7 +6391,7 @@
     if (arg == NULL)
 	return vim_strsave((char_u *)"(does not exist)");
     ret = tv2string(arg, &tofree, numbuf, 0);
-    /* Make a copy if we have a value but it's not in allocated memory. */
+    // Make a copy if we have a value but it's not in allocated memory.
     if (ret != NULL && tofree == NULL)
 	ret = vim_strsave(ret);
     return ret;
@@ -6425,7 +6424,7 @@
     char_u	*save_cpo;
     char_u	*zero_width = NULL;
 
-    /* Make 'cpoptions' empty, so that the 'l' flag doesn't work here */
+    // Make 'cpoptions' empty, so that the 'l' flag doesn't work here
     save_cpo = p_cpo;
     p_cpo = empty_option;
 
@@ -6441,12 +6440,12 @@
 	end = str + STRLEN(str);
 	while (vim_regexec_nl(&regmatch, str, (colnr_T)(tail - str)))
 	{
-	    /* Skip empty match except for first match. */
+	    // Skip empty match except for first match.
 	    if (regmatch.startp[0] == regmatch.endp[0])
 	    {
 		if (zero_width == regmatch.startp[0])
 		{
-		    /* avoid getting stuck on a match with an empty string */
+		    // avoid getting stuck on a match with an empty string
 		    i = mb_ptr2len(tail);
 		    mch_memmove((char_u *)ga.ga_data + ga.ga_len, tail,
 								   (size_t)i);
@@ -6472,10 +6471,10 @@
 		break;
 	    }
 
-	    /* copy the text up to where the match is */
+	    // copy the text up to where the match is
 	    i = (int)(regmatch.startp[0] - tail);
 	    mch_memmove((char_u *)ga.ga_data + ga.ga_len, tail, (size_t)i);
-	    /* add the substituted text */
+	    // add the substituted text
 	    (void)vim_regsub(&regmatch, sub, expr, (char_u *)ga.ga_data
 					  + ga.ga_len + i, TRUE, TRUE, FALSE);
 	    ga.ga_len += i + sublen - 1;
@@ -6497,7 +6496,7 @@
     if (p_cpo == empty_option)
 	p_cpo = save_cpo;
     else
-	/* Darn, evaluating {sub} expression or {expr} changed the value. */
+	// Darn, evaluating {sub} expression or {expr} changed the value.
 	free_string_option(save_cpo);
 
     return ret;
diff --git a/src/evalbuffer.c b/src/evalbuffer.c
index 00185b1..a475165 100644
--- a/src/evalbuffer.c
+++ b/src/evalbuffer.c
@@ -825,7 +825,7 @@
 restore_buffer(bufref_T *save_curbuf)
 {
     unblock_autocmds();
-    /* Check for valid buffer, just in case. */
+    // Check for valid buffer, just in case.
     if (bufref_valid(save_curbuf))
     {
 	--curbuf->b_nwindows;
diff --git a/src/evalfunc.c b/src/evalfunc.c
index f6ea57c..892a753 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -1290,7 +1290,7 @@
 	    int		size = split_message(msg, &array);
 	    int		i;
 
-	    /* Skip the first and last item, they are always empty. */
+	    // Skip the first and last item, they are always empty.
 	    for (i = 1; i < size - 1; ++i)
 		list_append_string(rettv->vval.v_list, array[i].pum_text, -1);
 	    while (size > 0)
@@ -1322,7 +1322,7 @@
 
     buf = buflist_find_by_name(name, curtab_only);
 
-    /* If not found, try expanding the name, like done for bufexists(). */
+    // If not found, try expanding the name, like done for bufexists().
     if (buf == NULL)
 	buf = find_buffer(tv);
 
@@ -1357,7 +1357,7 @@
 #else
     long	boff = 0;
 
-    boff = tv_get_number(&argvars[0]) - 1;  /* boff gets -1 on type error */
+    boff = tv_get_number(&argvars[0]) - 1;  // boff gets -1 on type error
     if (boff < 0)
 	rettv->vval.v_number = -1;
     else
@@ -1382,7 +1382,7 @@
     t = str;
     for ( ; idx > 0; idx--)
     {
-	if (*t == NUL)		/* EOL reached */
+	if (*t == NUL)		// EOL reached
 	    return;
 	if (enc_utf8 && comp)
 	    t += utf_ptr2len(t);
@@ -1438,7 +1438,7 @@
     else
 	func = tv_get_string(&argvars[0]);
     if (*func == NUL)
-	return;		/* type error or empty name */
+	return;		// type error or empty name
 
     if (argvars[2].v_type != VAR_UNKNOWN)
     {
@@ -1533,7 +1533,7 @@
     {
 	if (fp->col == MAXCOL)
 	{
-	    /* '> can be MAXCOL, get the length of the line then */
+	    // '> can be MAXCOL, get the length of the line then
 	    if (fp->lnum <= curbuf->b_ml.ml_line_count)
 		col = (colnr_T)STRLEN(ml_get(fp->lnum)) + 1;
 	    else
@@ -1542,8 +1542,8 @@
 	else
 	{
 	    col = fp->col + 1;
-	    /* col(".") when the cursor is on the NUL at the end of the line
-	     * because of "coladd" can be seen as an extra column. */
+	    // col(".") when the cursor is on the NUL at the end of the line
+	    // because of "coladd" can be seen as an extra column.
 	    if (virtual_active() && fp == &curwin->w_cursor)
 	    {
 		char_u	*p = ml_get_cursor();
@@ -1701,16 +1701,16 @@
 	    coladd = (long)tv_get_number_chk(&argvars[2], NULL);
     }
     if (line < 0 || col < 0 || coladd < 0)
-	return;		/* type error; errmsg already given */
+	return;		// type error; errmsg already given
     if (line > 0)
 	curwin->w_cursor.lnum = line;
     if (col > 0)
 	curwin->w_cursor.col = col - 1;
     curwin->w_cursor.coladd = coladd;
 
-    /* Make sure the cursor is in a valid position. */
+    // Make sure the cursor is in a valid position.
     check_cursor();
-    /* Correct cursor for multi-byte character. */
+    // Correct cursor for multi-byte character.
     if (has_mbyte)
 	mb_adjust_cursor();
 
@@ -1949,9 +1949,9 @@
     int		len;
 
     if (value_len == -1)
-	len = (int)STRLEN(value);	/* Append the entire string */
+	len = (int)STRLEN(value);	// Append the entire string
     else
-	len = value_len;		/* Append only "value_len" characters */
+	len = value_len;		// Append only "value_len" characters
     if (ga_grow(&redir_execute_ga, len) == OK)
     {
 	mch_memmove((char *)redir_execute_ga.ga_data
@@ -2009,7 +2009,7 @@
     {
 	list = argvars[arg_off].vval.v_list;
 	if (list == NULL || list->lv_first == NULL)
-	    /* empty list, no commands, empty output */
+	    // empty list, no commands, empty output
 	    return;
 	++list->lv_refcount;
     }
@@ -2059,7 +2059,7 @@
 	--list->lv_refcount;
     }
 
-    /* Need to append a NUL to the result. */
+    // Need to append a NUL to the result.
     if (ga_grow(&redir_execute_ga, 1) == OK)
     {
 	((char *)redir_execute_ga.ga_data)[redir_execute_ga.ga_len] = NUL;
@@ -2109,27 +2109,27 @@
     int		n = FALSE;
 
     p = tv_get_string(&argvars[0]);
-    if (*p == '$')			/* environment variable */
+    if (*p == '$')			// environment variable
     {
-	/* first try "normal" environment variables (fast) */
+	// first try "normal" environment variables (fast)
 	if (mch_getenv(p + 1) != NULL)
 	    n = TRUE;
 	else
 	{
-	    /* try expanding things like $VIM and ${HOME} */
+	    // try expanding things like $VIM and ${HOME}
 	    p = expand_env_save(p);
 	    if (p != NULL && *p != '$')
 		n = TRUE;
 	    vim_free(p);
 	}
     }
-    else if (*p == '&' || *p == '+')			/* option */
+    else if (*p == '&' || *p == '+')			// option
     {
 	n = (get_option_tv(&p, NULL, TRUE) == OK);
 	if (*skipwhite(p) != NUL)
-	    n = FALSE;			/* trailing garbage */
+	    n = FALSE;			// trailing garbage
     }
-    else if (*p == '*')			/* internal or user defined function */
+    else if (*p == '*')			// internal or user defined function
     {
 	n = function_exists(p + 1, FALSE);
     }
@@ -2144,7 +2144,7 @@
 	else
 	    n = au_exists(p + 1);
     }
-    else				/* internal variable */
+    else				// internal variable
     {
 	n = var_exists(p);
     }
@@ -2207,8 +2207,8 @@
     }
     else
     {
-	/* When the optional second argument is non-zero, don't remove matches
-	 * for 'wildignore' and don't put matches for 'suffixes' at the end. */
+	// When the optional second argument is non-zero, don't remove matches
+	// for 'wildignore' and don't put matches for 'suffixes' at the end.
 	if (argvars[1].v_type != VAR_UNKNOWN
 				    && tv_get_number_chk(&argvars[1], &error))
 	    options |= WILD_KEEP_ALL;
@@ -2281,9 +2281,9 @@
     int		lowlevel = FALSE;
     char_u	*keys_esc;
 
-    /* This is not allowed in the sandbox.  If the commands would still be
-     * executed in the sandbox it would be OK, but it probably happens later,
-     * when "sandbox" is no longer set. */
+    // This is not allowed in the sandbox.  If the commands would still be
+    // executed in the sandbox it would be OK, but it probably happens later,
+    // when "sandbox" is no longer set.
     if (check_secure())
 	return;
 
@@ -2309,8 +2309,8 @@
 
     if (*keys != NUL || execute)
     {
-	/* Need to escape K_SPECIAL and CSI before putting the string in the
-	 * typeahead buffer. */
+	// Need to escape K_SPECIAL and CSI before putting the string in the
+	// typeahead buffer.
 	keys_esc = vim_strsave_escape_csi(keys);
 	if (keys_esc != NULL)
 	{
@@ -2339,7 +2339,7 @@
 	    {
 		int save_msg_scroll = msg_scroll;
 
-		/* Avoid a 1 second delay when the keys start Insert mode. */
+		// Avoid a 1 second delay when the keys start Insert mode.
 		msg_scroll = FALSE;
 
 		if (!dangerous)
@@ -2446,19 +2446,19 @@
 
     if (argvars[0].v_type == VAR_FUNC)
     {
-	/* function(MyFunc, [arg], dict) */
+	// function(MyFunc, [arg], dict)
 	s = argvars[0].vval.v_string;
     }
     else if (argvars[0].v_type == VAR_PARTIAL
 					 && argvars[0].vval.v_partial != NULL)
     {
-	/* function(dict.MyFunc, [arg]) */
+	// function(dict.MyFunc, [arg])
 	arg_pt = argvars[0].vval.v_partial;
 	s = partial_name(arg_pt);
     }
     else
     {
-	/* function('MyFunc', [arg], dict) */
+	// function('MyFunc', [arg], dict)
 	s = tv_get_string(&argvars[0]);
 	use_string = TRUE;
     }
@@ -2475,7 +2475,7 @@
     if (s == NULL || *s == NUL || (use_string && VIM_ISDIGIT(*s))
 					 || (is_funcref && trans_name == NULL))
 	semsg(_(e_invarg2), use_string ? tv_get_string(&argvars[0]) : s);
-    /* Don't check an autoload name for existence here. */
+    // Don't check an autoload name for existence here.
     else if (trans_name != NULL && (is_funcref
 				? find_func(trans_name) == NULL
 				: !translated_function_exists(trans_name)))
@@ -2491,10 +2491,10 @@
 	    char	sid_buf[25];
 	    int		off = *s == 's' ? 2 : 5;
 
-	    /* Expand s: and <SID> into <SNR>nr_, so that the function can
-	     * also be called from another script. Using trans_function_name()
-	     * would also work, but some plugins depend on the name being
-	     * printable text. */
+	    // Expand s: and <SID> into <SNR>nr_, so that the function can
+	    // also be called from another script. Using trans_function_name()
+	    // would also work, but some plugins depend on the name being
+	    // printable text.
 	    sprintf(sid_buf, "<SNR>%ld_", (long)current_sctx.sc_sid);
 	    name = alloc(STRLEN(sid_buf) + STRLEN(s + off) + 1);
 	    if (name != NULL)
@@ -2510,15 +2510,15 @@
 	{
 	    if (argvars[2].v_type != VAR_UNKNOWN)
 	    {
-		/* function(name, [args], dict) */
+		// function(name, [args], dict)
 		arg_idx = 1;
 		dict_idx = 2;
 	    }
 	    else if (argvars[1].v_type == VAR_DICT)
-		/* function(name, dict) */
+		// function(name, dict)
 		dict_idx = 1;
 	    else
-		/* function(name, [args]) */
+		// function(name, [args])
 		arg_idx = 1;
 	    if (dict_idx > 0)
 	    {
@@ -2554,7 +2554,7 @@
 	{
 	    partial_T	*pt = ALLOC_CLEAR_ONE(partial_T);
 
-	    /* result is a VAR_PARTIAL */
+	    // result is a VAR_PARTIAL
 	    if (pt == NULL)
 		vim_free(name);
 	    else
@@ -2586,18 +2586,18 @@
 			    copy_tv(&li->li_tv, &pt->pt_argv[i++]);
 		}
 
-		/* For "function(dict.func, [], dict)" and "func" is a partial
-		 * use "dict".  That is backwards compatible. */
+		// For "function(dict.func, [], dict)" and "func" is a partial
+		// use "dict".  That is backwards compatible.
 		if (dict_idx > 0)
 		{
-		    /* The dict is bound explicitly, pt_auto is FALSE. */
+		    // The dict is bound explicitly, pt_auto is FALSE.
 		    pt->pt_dict = argvars[dict_idx].vval.v_dict;
 		    ++pt->pt_dict->dv_refcount;
 		}
 		else if (arg_pt != NULL)
 		{
-		    /* If the dict was bound automatically the result is also
-		     * bound automatically. */
+		    // If the dict was bound automatically the result is also
+		    // bound automatically.
 		    pt->pt_dict = arg_pt->pt_dict;
 		    pt->pt_auto = arg_pt->pt_auto;
 		    if (pt->pt_dict != NULL)
@@ -2628,7 +2628,7 @@
 	}
 	else
 	{
-	    /* result is a VAR_FUNC */
+	    // result is a VAR_FUNC
 	    rettv->v_type = VAR_FUNC;
 	    rettv->vval.v_string = name;
 	    func_ref(name);
@@ -2662,8 +2662,8 @@
     static void
 f_garbagecollect(typval_T *argvars, typval_T *rettv UNUSED)
 {
-    /* This is postponed until we are back at the toplevel, because we may be
-     * using Lists and Dicts internally.  E.g.: ":echo [garbagecollect()]". */
+    // This is postponed until we are back at the toplevel, because we may be
+    // using Lists and Dicts internally.  E.g.: ":echo [garbagecollect()]".
     want_garbage_collect = TRUE;
 
     if (argvars[0].v_type != VAR_UNKNOWN && tv_get_number(&argvars[0]) == 1)
@@ -2922,19 +2922,19 @@
 
 	if (argvars[0].v_type == VAR_UNKNOWN)
 	{
-	    /* Get the "Normal" font.  Either the name saved by
-	     * hl_set_font_name() or from the font ID. */
+	    // Get the "Normal" font.  Either the name saved by
+	    // hl_set_font_name() or from the font ID.
 	    font = gui.norm_font;
 	    name = hl_get_font_name();
 	}
 	else
 	{
 	    name = tv_get_string(&argvars[0]);
-	    if (STRCMP(name, "*") == 0)	    /* don't use font dialog */
+	    if (STRCMP(name, "*") == 0)	    // don't use font dialog
 		return;
 	    font = gui_mch_get_font(name, FALSE);
 	    if (font == NOFONT)
-		return;	    /* Invalid font name, return empty string. */
+		return;	    // Invalid font name, return empty string.
 	}
 	rettv->vval.v_string = gui_mch_get_fontname(font, name);
 	if (argvars[0].v_type != VAR_UNKNOWN)
@@ -3137,7 +3137,7 @@
     if (argvars[0].v_type != VAR_UNKNOWN)
     {
 	strregname = tv_get_string_chk(&argvars[0]);
-	if (strregname == NULL)	    /* type error; errmsg already given */
+	if (strregname == NULL)	    // type error; errmsg already given
 	{
 	    rettv->v_type = VAR_STRING;
 	    rettv->vval.v_string = NULL;
@@ -3145,7 +3145,7 @@
 	}
     }
     else
-	/* Default to v:register */
+	// Default to v:register
 	strregname = get_vim_var_str(VV_REG);
 
     regname = (strregname == NULL ? '"' : *strregname);
@@ -3188,7 +3188,7 @@
     get_tagstack(wp, rettv->vval.v_dict);
 }
 
-/* for VIM_VERSION_ defines */
+// for VIM_VERSION_ defines
 #include "version.h"
 
 /*
@@ -3221,11 +3221,11 @@
 	"linux",
 #endif
 #ifdef MACOS_X
-	"mac",		/* Mac OS X (and, once, Mac OS Classic) */
-	"osx",		/* Mac OS X */
+	"mac",		// Mac OS X (and, once, Mac OS Classic)
+	"osx",		// Mac OS X
 # ifdef MACOS_X_DARWIN
-	"macunix",	/* Mac OS X, with the darwin feature */
-	"osxdarwin",	/* synonym for macunix */
+	"macunix",	// Mac OS X, with the darwin feature
+	"osxdarwin",	// synonym for macunix
 # endif
 #endif
 #ifdef __QNX__
@@ -3272,7 +3272,7 @@
 #endif
 #ifdef FEAT_BEVAL_GUI
 	"balloon_eval",
-# ifndef FEAT_GUI_MSWIN /* other GUIs always have multiline balloons */
+# ifndef FEAT_GUI_MSWIN // other GUIs always have multiline balloons
 	"balloon_multiline",
 # endif
 #endif
@@ -3347,8 +3347,8 @@
 #ifdef FEAT_EMACS_TAGS
 	"emacs_tags",
 #endif
-	"eval",	    /* always present, of course! */
-	"ex_extra", /* graduated feature */
+	"eval",	    // always present, of course!
+	"ex_extra", // graduated feature
 #ifdef FEAT_SEARCH_EXTRA
 	"extra_search",
 #endif
@@ -3422,7 +3422,7 @@
 #ifdef FEAT_KEYMAP
 	"keymap",
 #endif
-	"lambda", /* always with FEAT_EVAL, since 7.4.2120 with closure */
+	"lambda", // always with FEAT_EVAL, since 7.4.2120 with closure
 #ifdef FEAT_LANGMAP
 	"langmap",
 #endif
@@ -3629,7 +3629,7 @@
 #if defined(FEAT_CLIPBOARD) && defined(FEAT_X11)
 	"unnamedplus",
 #endif
-	"user-commands",    /* was accidentally included in 5.4 */
+	"user-commands",    // was accidentally included in 5.4
 	"user_commands",
 #ifdef FEAT_VARTABS
 	"vartabs",
@@ -3670,7 +3670,7 @@
 #endif
 #ifdef FEAT_XPM_W32
 	"xpm",
-	"xpm_w32",	/* for backward compatibility */
+	"xpm_w32",	// for backward compatibility
 #else
 # if defined(HAVE_XPM)
 	"xpm",
@@ -3715,7 +3715,7 @@
 		int major = atoi((char *)name + 6);
 		int minor = atoi((char *)name + 8);
 
-		/* Expect "patch-9.9.01234". */
+		// Expect "patch-9.9.01234".
 		n = (major < VIM_VERSION_MAJOR
 		     || (major == VIM_VERSION_MAJOR
 			 && (minor < VIM_VERSION_MINOR
@@ -3791,7 +3791,7 @@
 	    n = (gui.in_use || gui.starting);
 # ifdef FEAT_BROWSE
 	else if (STRICMP(name, "browse") == 0)
-	    n = gui.in_use;	/* gui_mch_browse() works when GUI is running */
+	    n = gui.in_use;	// gui_mch_browse() works when GUI is running
 # endif
 #endif
 #ifdef FEAT_SYN_HL
@@ -3929,7 +3929,7 @@
     vimconv.vc_type = CONV_NONE;
     convert_setup(&vimconv, from, to);
 
-    /* If the encodings are equal, no conversion needed. */
+    // If the encodings are equal, no conversion needed.
     if (vimconv.vc_type == CONV_NONE)
 	rettv->vval.v_string = vim_strsave(str);
     else
@@ -3999,8 +3999,8 @@
 	item = l->lv_first;
 	if (argvars[2].v_type != VAR_UNKNOWN)
 	{
-	    /* Start at specified item.  Use the cached index that list_find()
-	     * sets, so that a negative number also works. */
+	    // Start at specified item.  Use the cached index that list_find()
+	    // sets, so that a negative number also works.
 	    item = list_find(l, (long)tv_get_number_chk(&argvars[2], &error));
 	    idx = l->lv_idx;
 	    if (argvars[3].v_type != VAR_UNKNOWN)
@@ -4037,7 +4037,7 @@
 f_inputdialog(typval_T *argvars, typval_T *rettv)
 {
 #if defined(FEAT_GUI_TEXTDIALOG)
-    /* Use a GUI dialog if the GUI is running and 'c' is not in 'guioptions' */
+    // Use a GUI dialog if the GUI is running and 'c' is not in 'guioptions'
     if (gui.in_use && vim_strchr(p_go, GO_CONDIALOG) == NULL)
     {
 	char_u	*message;
@@ -4082,8 +4082,8 @@
     int		mouse_used;
 
 #ifdef NO_CONSOLE_INPUT
-    /* While starting up, there is no place to enter text. When running tests
-     * with --not-a-term we assume feedkeys() will be used. */
+    // While starting up, there is no place to enter text. When running tests
+    // with --not-a-term we assume feedkeys() will be used.
     if (no_console_input() && !is_not_a_term())
 	return;
 #endif
@@ -4094,8 +4094,8 @@
     }
 
     msg_start();
-    msg_row = Rows - 1;	/* for when 'cmdheight' > 1 */
-    lines_left = Rows;	/* avoid more prompt */
+    msg_row = Rows - 1;	// for when 'cmdheight' > 1
+    lines_left = Rows;	// avoid more prompt
     msg_scroll = TRUE;
     msg_clr_eos();
 
@@ -4105,7 +4105,7 @@
 	msg_putchar('\n');
     }
 
-    /* Ask for choice. */
+    // Ask for choice.
     selected = prompt_for_number(&mouse_used);
     if (mouse_used)
 	selected -= lines_left;
@@ -4126,12 +4126,12 @@
 	--ga_userinput.ga_len;
 	restore_typeahead((tasave_T *)(ga_userinput.ga_data)
 						       + ga_userinput.ga_len);
-	/* default return is zero == OK */
+	// default return is zero == OK
     }
     else if (p_verbose > 1)
     {
 	verb_msg(_("called inputrestore() more often than inputsave()"));
-	rettv->vval.v_number = 1; /* Failed */
+	rettv->vval.v_number = 1; // Failed
     }
 }
 
@@ -4141,16 +4141,16 @@
     static void
 f_inputsave(typval_T *argvars UNUSED, typval_T *rettv)
 {
-    /* Add an entry to the stack of typeahead storage. */
+    // Add an entry to the stack of typeahead storage.
     if (ga_grow(&ga_userinput, 1) == OK)
     {
 	save_typeahead((tasave_T *)(ga_userinput.ga_data)
 						       + ga_userinput.ga_len);
 	++ga_userinput.ga_len;
-	/* default return is zero == OK */
+	// default return is zero == OK
     }
     else
-	rettv->vval.v_number = 1; /* Failed */
+	rettv->vval.v_number = 1; // Failed
 }
 
 /*
@@ -4224,11 +4224,10 @@
 		di = find_var(lv.ll_name, NULL, TRUE);
 		if (di != NULL)
 		{
-		    /* Consider a variable locked when:
-		     * 1. the variable itself is locked
-		     * 2. the value of the variable is locked.
-		     * 3. the List or Dict value is locked.
-		     */
+		    // Consider a variable locked when:
+		    // 1. the variable itself is locked
+		    // 2. the value of the variable is locked.
+		    // 3. the List or Dict value is locked.
 		    rettv->vval.v_number = ((di->di_flags & DI_FLAGS_LOCK)
 						   || tv_islocked(&di->di_tv));
 		}
@@ -4238,10 +4237,10 @@
 	    else if (lv.ll_newkey != NULL)
 		semsg(_(e_dictkey), lv.ll_newkey);
 	    else if (lv.ll_list != NULL)
-		/* List item. */
+		// List item.
 		rettv->vval.v_number = tv_islocked(&lv.ll_li->li_tv);
 	    else
-		/* Dictionary item. */
+		// Dictionary item.
 		rettv->vval.v_number = tv_islocked(&lv.ll_di->di_tv);
 	}
     }
@@ -4338,7 +4337,7 @@
 	return;
 
 #ifdef FEAT_LIBCALL
-    /* The first two args must be strings, otherwise it's meaningless */
+    // The first two args must be strings, otherwise it's meaningless
     if (argvars[0].v_type == VAR_STRING && argvars[1].v_type == VAR_STRING)
     {
 	string_in = NULL;
@@ -4518,11 +4517,11 @@
 
 typedef enum
 {
-    MATCH_END,	    /* matchend() */
-    MATCH_MATCH,    /* match() */
-    MATCH_STR,	    /* matchstr() */
-    MATCH_LIST,	    /* matchlist() */
-    MATCH_POS	    /* matchstrpos() */
+    MATCH_END,	    // matchend()
+    MATCH_MATCH,    // match()
+    MATCH_STR,	    // matchstr()
+    MATCH_LIST,	    // matchlist()
+    MATCH_POS	    // matchstrpos()
 } matchtype_T;
 
     static void
@@ -4545,15 +4544,15 @@
     long	idx = 0;
     char_u	*tofree = NULL;
 
-    /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
+    // Make 'cpoptions' empty, the 'l' flag should not be used here.
     save_cpo = p_cpo;
     p_cpo = (char_u *)"";
 
     rettv->vval.v_number = -1;
     if (type == MATCH_LIST || type == MATCH_POS)
     {
-	/* type MATCH_LIST: return empty list when there are no matches.
-	 * type MATCH_POS: return ["", -1, -1, -1] */
+	// type MATCH_LIST: return empty list when there are no matches.
+	// type MATCH_POS: return ["", -1, -1, -1]
 	if (rettv_list_alloc(rettv) == FAIL)
 	    goto theend;
 	if (type == MATCH_POS
@@ -4605,7 +4604,7 @@
 	    li = list_find(l, start);
 	    if (li == NULL)
 		goto theend;
-	    idx = l->lv_idx;	/* use the cached index */
+	    idx = l->lv_idx;	// use the cached index
 	}
 	else
 	{
@@ -4613,9 +4612,9 @@
 		start = 0;
 	    if (start > len)
 		goto theend;
-	    /* When "count" argument is there ignore matches before "start",
-	     * otherwise skip part of the string.  Differs when pattern is "^"
-	     * or "\<". */
+	    // When "count" argument is there ignore matches before "start",
+	    // otherwise skip part of the string.  Differs when pattern is "^"
+	    // or "\<".
 	    if (argvars[3].v_type != VAR_UNKNOWN)
 		startcol = start;
 	    else
@@ -4658,7 +4657,7 @@
 	    if (l == NULL && !match)
 		break;
 
-	    /* Advance to just after the match. */
+	    // Advance to just after the match.
 	    if (l != NULL)
 	    {
 		li = li->li_next;
@@ -4700,7 +4699,7 @@
 	    {
 		int i;
 
-		/* return list with matched string and submatches */
+		// return list with matched string and submatches
 		for (i = 0; i < NSUBEXP; ++i)
 		{
 		    if (regmatch.endp[i] == NULL)
@@ -4718,7 +4717,7 @@
 	    }
 	    else if (type == MATCH_STR)
 	    {
-		/* return matched string */
+		// return matched string
 		if (l != NULL)
 		    copy_tv(&li->li_tv, rettv);
 		else
@@ -4743,7 +4742,7 @@
 
 theend:
     if (type == MATCH_POS && l == NULL && rettv->vval.v_list != NULL)
-	/* matchstrpos() without a list: drop the second item. */
+	// matchstrpos() without a list: drop the second item.
 	listitem_remove(rettv->vval.v_list,
 				       rettv->vval.v_list->lv_first->li_next);
     vim_free(tofree);
@@ -5016,10 +5015,10 @@
     rettv->vval.v_number = lnum;
 }
 
-/* This dummy va_list is here because:
- * - passing a NULL pointer doesn't work when va_list isn't a pointer
- * - locally in the function results in a "used before set" warning
- * - using va_start() to initialize it gives "function with fixed args" error */
+// This dummy va_list is here because:
+// - passing a NULL pointer doesn't work when va_list isn't a pointer
+// - locally in the function results in a "used before set" warning
+// - using va_start() to initialize it gives "function with fixed args" error
 static va_list	ap;
 
 /*
@@ -5037,7 +5036,7 @@
     rettv->v_type = VAR_STRING;
     rettv->vval.v_string = NULL;
 
-    /* Get the required length, allocate the buffer and do it for real. */
+    // Get the required length, allocate the buffer and do it for real.
     did_emsg = FALSE;
     fmt = (char *)tv_get_string_buf(&argvars[0], buf);
     len = vim_vsnprintf_typval(NULL, 0, fmt, ap, argvars + 1);
@@ -5244,7 +5243,7 @@
     }
 
     if (error)
-	return;		/* type error; errmsg already given */
+	return;		// type error; errmsg already given
     if (stride == 0)
 	emsg(_("E726: Stride is zero"));
     else if (stride > 0 ? end + 1 < start : end - 1 > start)
@@ -5312,7 +5311,7 @@
 # endif
     return error ? FAIL : OK;
 }
-#endif /* FEAT_RELTIME */
+#endif // FEAT_RELTIME
 
 /*
  * "reltime()" function
@@ -5326,7 +5325,7 @@
 
     if (argvars[0].v_type == VAR_UNKNOWN)
     {
-	/* No arguments: get current time. */
+	// No arguments: get current time.
 	profile_start(&res);
     }
     else if (argvars[1].v_type == VAR_UNKNOWN)
@@ -5337,7 +5336,7 @@
     }
     else
     {
-	/* Two arguments: compute the difference. */
+	// Two arguments: compute the difference.
 	if (list2proftime(&argvars[0], &start) == FAIL
 		|| list2proftime(&argvars[1], &res) == FAIL)
 	    return;
@@ -5456,7 +5455,7 @@
 
     server_name = tv_get_string_chk(&argvars[0]);
     if (server_name == NULL)
-	return;		/* type error; errmsg already given */
+	return;		// type error; errmsg already given
     keys = tv_get_string_buf(&argvars[1], buf);
 # ifdef MSWIN
     if (serverSendToVim(server_name, keys, &r, &w, expr, timeout, TRUE) < 0)
@@ -5517,7 +5516,7 @@
 {
 #ifdef FEAT_CLIENTSERVER
 # ifdef MSWIN
-    /* On Win32 it's done in this application. */
+    // On Win32 it's done in this application.
     {
 	char_u	*server_name = tv_get_string_chk(&argvars[0]);
 
@@ -5525,7 +5524,7 @@
 	    serverForeground(server_name);
     }
 # else
-    /* Send a foreground() expression to the server. */
+    // Send a foreground() expression to the server.
     argvars[1].v_type = VAR_STRING;
     argvars[1].vval.v_string = vim_strsave((char_u *)"foreground()");
     argvars[2].v_type = VAR_UNKNOWN;
@@ -5557,7 +5556,7 @@
     if (serverid == NULL)
     {
 	rettv->vval.v_number = -1;
-	return;		/* type error; errmsg already given */
+	return;		// type error; errmsg already given
     }
 # ifdef MSWIN
     sscanf((const char *)serverid, SCANF_HEX_LONG_U, &n);
@@ -5604,7 +5603,7 @@
     {
 	int timeout = 0;
 # ifdef MSWIN
-	/* The server's HWND is encoded in the 'id' parameter */
+	// The server's HWND is encoded in the 'id' parameter
 	long_u		n = 0;
 # endif
 
@@ -5651,7 +5650,7 @@
     char_u	*server = tv_get_string_chk(&argvars[0]);
 
     if (server == NULL)
-	return;		/* type error; errmsg already given */
+	return;		// type error; errmsg already given
     if (serverName != NULL)
 	emsg(_("E941: already started a server"));
     else
@@ -5728,14 +5727,14 @@
     }
 }
 
-#define SP_NOMOVE	0x01	    /* don't move cursor */
-#define SP_REPEAT	0x02	    /* repeat to find outer pair */
-#define SP_RETCOUNT	0x04	    /* return matchcount */
-#define SP_SETPCMARK	0x08	    /* set previous context mark */
-#define SP_START	0x10	    /* accept match at start position */
-#define SP_SUBPAT	0x20	    /* return nr of matching sub-pattern */
-#define SP_END		0x40	    /* leave cursor at end of match */
-#define SP_COLUMN	0x80	    /* start at cursor column */
+#define SP_NOMOVE	0x01	    // don't move cursor
+#define SP_REPEAT	0x02	    // repeat to find outer pair
+#define SP_RETCOUNT	0x04	    // return matchcount
+#define SP_SETPCMARK	0x08	    // set previous context mark
+#define SP_START	0x10	    // accept match at start position
+#define SP_SUBPAT	0x20	    // return nr of matching sub-pattern
+#define SP_END		0x40	    // leave cursor at end of match
+#define SP_COLUMN	0x80	    // start at cursor column
 
 /*
  * Get flags for a search function.
@@ -5754,7 +5753,7 @@
     {
 	flags = tv_get_string_buf_chk(varp, nbuf);
 	if (flags == NULL)
-	    return 0;		/* type error; errmsg already given */
+	    return 0;		// type error; errmsg already given
 	while (*flags != NUL)
 	{
 	    switch (*flags)
@@ -5803,7 +5802,7 @@
     pos_T	save_cursor;
     int		save_p_ws = p_ws;
     int		dir;
-    int		retval = 0;	/* default: FAIL */
+    int		retval = 0;	// default: FAIL
     long	lnum_stop = 0;
 #ifdef FEAT_RELTIME
     proftime_T	tm;
@@ -5814,7 +5813,7 @@
     searchit_arg_T sia;
 
     pat = tv_get_string(&argvars[0]);
-    dir = get_search_arg(&argvars[1], flagsp);	/* may set p_ws */
+    dir = get_search_arg(&argvars[1], flagsp);	// may set p_ws
     if (dir == 0)
 	goto theend;
     flags = *flagsp;
@@ -5825,7 +5824,7 @@
     if (flags & SP_COLUMN)
 	options |= SEARCH_COL;
 
-    /* Optional arguments: line number to stop searching and timeout. */
+    // Optional arguments: line number to stop searching and timeout.
     if (argvars[1].v_type != VAR_UNKNOWN && argvars[2].v_type != VAR_UNKNOWN)
     {
 	lnum_stop = (long)tv_get_number_chk(&argvars[2], NULL);
@@ -5842,7 +5841,7 @@
     }
 
 #ifdef FEAT_RELTIME
-    /* Set the time limit, if there is one. */
+    // Set the time limit, if there is one.
     profile_setlimit(time_limit, &tm);
 #endif
 
@@ -5878,16 +5877,16 @@
 	curwin->w_cursor = pos;
 	if (match_pos != NULL)
 	{
-	    /* Store the match cursor position */
+	    // Store the match cursor position
 	    match_pos->lnum = pos.lnum;
 	    match_pos->col = pos.col + 1;
 	}
-	/* "/$" will put the cursor after the end of the line, may need to
-	 * correct that here */
+	// "/$" will put the cursor after the end of the line, may need to
+	// correct that here
 	check_cursor();
     }
 
-    /* If 'n' flag is used: restore cursor position. */
+    // If 'n' flag is used: restore cursor position.
     if (flags & SP_NOMOVE)
 	curwin->w_cursor = save_cursor;
     else
@@ -6098,7 +6097,7 @@
     int		error = FALSE;
     char_u	*name;
 
-    rettv->vval.v_number = 1;	/* default: FAIL */
+    rettv->vval.v_number = 1;	// default: FAIL
 
     name = tv_get_string_chk(&argvars[0]);
     if (argvars[1].v_type != VAR_UNKNOWN)
@@ -6125,26 +6124,25 @@
     int		flags = 0;
     char_u	nbuf1[NUMBUFLEN];
     char_u	nbuf2[NUMBUFLEN];
-    int		retval = 0;		/* default: FAIL */
+    int		retval = 0;		// default: FAIL
     long	lnum_stop = 0;
     long	time_limit = 0;
 
-    /* Get the three pattern arguments: start, middle, end. Will result in an
-     * error if not a valid argument. */
+    // Get the three pattern arguments: start, middle, end. Will result in an
+    // error if not a valid argument.
     spat = tv_get_string_chk(&argvars[0]);
     mpat = tv_get_string_buf_chk(&argvars[1], nbuf1);
     epat = tv_get_string_buf_chk(&argvars[2], nbuf2);
     if (spat == NULL || mpat == NULL || epat == NULL)
-	goto theend;	    /* type error */
+	goto theend;	    // type error
 
-    /* Handle the optional fourth argument: flags */
-    dir = get_search_arg(&argvars[3], &flags); /* may set p_ws */
+    // Handle the optional fourth argument: flags
+    dir = get_search_arg(&argvars[3], &flags); // may set p_ws
     if (dir == 0)
 	goto theend;
 
-    /* Don't accept SP_END or SP_SUBPAT.
-     * Only one of the SP_NOMOVE or SP_SETPCMARK flags can be set.
-     */
+    // Don't accept SP_END or SP_SUBPAT.
+    // Only one of the SP_NOMOVE or SP_SETPCMARK flags can be set.
     if ((flags & (SP_END | SP_SUBPAT)) != 0
 	    || ((flags & SP_NOMOVE) && (flags & SP_SETPCMARK)))
     {
@@ -6152,11 +6150,11 @@
 	goto theend;
     }
 
-    /* Using 'r' implies 'W', otherwise it doesn't work. */
+    // Using 'r' implies 'W', otherwise it doesn't work.
     if (flags & SP_REPEAT)
 	p_ws = FALSE;
 
-    /* Optional fifth argument: skip expression */
+    // Optional fifth argument: skip expression
     if (argvars[3].v_type == VAR_UNKNOWN
 	    || argvars[4].v_type == VAR_UNKNOWN)
 	skip = NULL;
@@ -6166,7 +6164,7 @@
 	if (skip->v_type != VAR_FUNC && skip->v_type != VAR_PARTIAL
 	    && skip->v_type != VAR_STRING)
 	{
-	    /* Type error */
+	    // Type error
 	    semsg(_(e_invarg2), tv_get_string(&argvars[4]));
 	    goto theend;
 	}
@@ -6240,15 +6238,15 @@
  */
     long
 do_searchpair(
-    char_u	*spat,	    /* start pattern */
-    char_u	*mpat,	    /* middle pattern */
-    char_u	*epat,	    /* end pattern */
-    int		dir,	    /* BACKWARD or FORWARD */
-    typval_T	*skip,	    /* skip expression */
-    int		flags,	    /* SP_SETPCMARK and other SP_ values */
+    char_u	*spat,	    // start pattern
+    char_u	*mpat,	    // middle pattern
+    char_u	*epat,	    // end pattern
+    int		dir,	    // BACKWARD or FORWARD
+    typval_T	*skip,	    // skip expression
+    int		flags,	    // SP_SETPCMARK and other SP_ values
     pos_T	*match_pos,
-    linenr_T	lnum_stop,  /* stop at this line if not zero */
-    long	time_limit UNUSED) /* stop after this many msec */
+    linenr_T	lnum_stop,  // stop at this line if not zero
+    long	time_limit UNUSED) // stop after this many msec
 {
     char_u	*save_cpo;
     char_u	*pat, *pat2 = NULL, *pat3 = NULL;
@@ -6268,17 +6266,17 @@
     proftime_T	tm;
 #endif
 
-    /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
+    // Make 'cpoptions' empty, the 'l' flag should not be used here.
     save_cpo = p_cpo;
     p_cpo = empty_option;
 
 #ifdef FEAT_RELTIME
-    /* Set the time limit, if there is one. */
+    // Set the time limit, if there is one.
     profile_setlimit(time_limit, &tm);
 #endif
 
-    /* Make two search patterns: start/end (pat2, for in nested pairs) and
-     * start/middle/end (pat3, for the top pair). */
+    // Make two search patterns: start/end (pat2, for in nested pairs) and
+    // start/middle/end (pat3, for the top pair).
     pat2 = alloc(STRLEN(spat) + STRLEN(epat) + 17);
     pat3 = alloc(STRLEN(spat) + STRLEN(mpat) + STRLEN(epat) + 25);
     if (pat2 == NULL || pat3 == NULL)
@@ -6294,7 +6292,7 @@
 
     if (skip != NULL)
     {
-	/* Empty string means to not use the skip expression. */
+	// Empty string means to not use the skip expression.
 	if (skip->v_type == VAR_STRING || skip->v_type == VAR_FUNC)
 	    use_skip = skip->vval.v_string != NULL
 						&& *skip->vval.v_string != NUL;
@@ -6317,16 +6315,16 @@
 	n = searchit(curwin, curbuf, &pos, NULL, dir, pat, 1L,
 						     options, RE_SEARCH, &sia);
 	if (n == FAIL || (firstpos.lnum != 0 && EQUAL_POS(pos, firstpos)))
-	    /* didn't find it or found the first match again: FAIL */
+	    // didn't find it or found the first match again: FAIL
 	    break;
 
 	if (firstpos.lnum == 0)
 	    firstpos = pos;
 	if (EQUAL_POS(pos, foundpos))
 	{
-	    /* Found the same position again.  Can happen with a pattern that
-	     * has "\zs" at the end and searching backwards.  Advance one
-	     * character and try again. */
+	    // Found the same position again.  Can happen with a pattern that
+	    // has "\zs" at the end and searching backwards.  Advance one
+	    // character and try again.
 	    if (dir == BACKWARD)
 		decl(&pos);
 	    else
@@ -6334,10 +6332,10 @@
 	}
 	foundpos = pos;
 
-	/* clear the start flag to avoid getting stuck here */
+	// clear the start flag to avoid getting stuck here
 	options &= ~SEARCH_START;
 
-	/* If the skip pattern matches, ignore this match. */
+	// If the skip pattern matches, ignore this match.
 	if (use_skip)
 	{
 	    save_pos = curwin->w_cursor;
@@ -6347,7 +6345,7 @@
 	    curwin->w_cursor = save_pos;
 	    if (err)
 	    {
-		/* Evaluating {skip} caused an error, break here. */
+		// Evaluating {skip} caused an error, break here.
 		curwin->w_cursor = save_cursor;
 		retval = -1;
 		break;
@@ -6358,22 +6356,22 @@
 
 	if ((dir == BACKWARD && n == 3) || (dir == FORWARD && n == 2))
 	{
-	    /* Found end when searching backwards or start when searching
-	     * forward: nested pair. */
+	    // Found end when searching backwards or start when searching
+	    // forward: nested pair.
 	    ++nest;
-	    pat = pat2;		/* nested, don't search for middle */
+	    pat = pat2;		// nested, don't search for middle
 	}
 	else
 	{
-	    /* Found end when searching forward or start when searching
-	     * backward: end of (nested) pair; or found middle in outer pair. */
+	    // Found end when searching forward or start when searching
+	    // backward: end of (nested) pair; or found middle in outer pair.
 	    if (--nest == 1)
-		pat = pat3;	/* outer level, search for middle */
+		pat = pat3;	// outer level, search for middle
 	}
 
 	if (nest == 0)
 	{
-	    /* Found the match: return matchcount or line number. */
+	    // Found the match: return matchcount or line number.
 	    if (flags & SP_RETCOUNT)
 		++retval;
 	    else
@@ -6383,18 +6381,18 @@
 	    curwin->w_cursor = pos;
 	    if (!(flags & SP_REPEAT))
 		break;
-	    nest = 1;	    /* search for next unmatched */
+	    nest = 1;	    // search for next unmatched
 	}
     }
 
     if (match_pos != NULL)
     {
-	/* Store the match cursor position */
+	// Store the match cursor position
 	match_pos->lnum = curwin->w_cursor.lnum;
 	match_pos->col = curwin->w_cursor.col + 1;
     }
 
-    /* If 'n' flag is used or search failed: restore cursor position. */
+    // If 'n' flag is used or search failed: restore cursor position.
     if ((flags & SP_NOMOVE) || retval == 0)
 	curwin->w_cursor = save_cursor;
 
@@ -6404,7 +6402,7 @@
     if (p_cpo == empty_option)
 	p_cpo = save_cpo;
     else
-	/* Darn, evaluating the {skip} expression changed the value. */
+	// Darn, evaluating the {skip} expression changed the value.
 	free_string_option(save_cpo);
 
     return retval;
@@ -6600,7 +6598,7 @@
 		pos.col = 0;
 	    if (name[0] == '.' && name[1] == NUL)
 	    {
-		/* set cursor; "fnum" is ignored */
+		// set cursor; "fnum" is ignored
 		curwin->w_cursor = pos;
 		if (curswant >= 0)
 		{
@@ -6612,7 +6610,7 @@
 	    }
 	    else if (name[0] == '\'' && name[1] != NUL && name[2] == NUL)
 	    {
-		/* set mark */
+		// set mark
 		if (setmark_pos(name[1], &pos, fnum) == OK)
 		    rettv->vval.v_number = 0;
 	    }
@@ -6641,10 +6639,10 @@
     append = FALSE;
 
     strregname = tv_get_string_chk(argvars);
-    rettv->vval.v_number = 1;		/* FAIL is default */
+    rettv->vval.v_number = 1;		// FAIL is default
 
     if (strregname == NULL)
-	return;		/* type error; errmsg already given */
+	return;		// type error; errmsg already given
     regname = *strregname;
     if (regname == 0 || regname == '@')
 	regname = '"';
@@ -6653,20 +6651,20 @@
     {
 	stropt = tv_get_string_chk(&argvars[2]);
 	if (stropt == NULL)
-	    return;		/* type error */
+	    return;		// type error
 	for (; *stropt != NUL; ++stropt)
 	    switch (*stropt)
 	    {
-		case 'a': case 'A':	/* append */
+		case 'a': case 'A':	// append
 		    append = TRUE;
 		    break;
-		case 'v': case 'c':	/* character-wise selection */
+		case 'v': case 'c':	// character-wise selection
 		    yank_type = MCHAR;
 		    break;
-		case 'V': case 'l':	/* line-wise selection */
+		case 'V': case 'l':	// line-wise selection
 		    yank_type = MLINE;
 		    break;
-		case 'b': case Ctrl_V:	/* block-wise selection */
+		case 'b': case Ctrl_V:	// block-wise selection
 		    yank_type = MBLOCK;
 		    if (VIM_ISDIGIT(stropt[1]))
 		    {
@@ -6689,11 +6687,11 @@
 	listitem_T	*li;
 	int		len;
 
-	/* If the list is NULL handle like an empty list. */
+	// If the list is NULL handle like an empty list.
 	len = ll == NULL ? 0 : ll->lv_len;
 
-	/* First half: use for pointers to result lines; second half: use for
-	 * pointers to allocated copies. */
+	// First half: use for pointers to result lines; second half: use for
+	// pointers to allocated copies.
 	lstval = ALLOC_MULT(char_u *, (len + 1) * 2);
 	if (lstval == NULL)
 	    return;
@@ -6709,8 +6707,8 @@
 		goto free_lstval;
 	    if (strval == buf)
 	    {
-		/* Need to make a copy, next tv_get_string_buf_chk() will
-		 * overwrite the string. */
+		// Need to make a copy, next tv_get_string_buf_chk() will
+		// overwrite the string.
 		strval = vim_strsave(buf);
 		if (strval == NULL)
 		    goto free_lstval;
@@ -6808,7 +6806,7 @@
 				    sha256_bytes(p, (int)STRLEN(p), NULL, 0));
     rettv->v_type = VAR_STRING;
 }
-#endif /* FEAT_CRYPT */
+#endif // FEAT_CRYPT
 
 /*
  * "shellescape({string})" function
@@ -6912,7 +6910,7 @@
 #ifdef FEAT_SPELL
     if (argvars[0].v_type == VAR_UNKNOWN)
     {
-	/* Find the start and length of the badly spelled word. */
+	// Find the start and length of the badly spelled word.
 	len = spell_move_to(curwin, FORWARD, TRUE, TRUE, &attr);
 	if (len != 0)
 	{
@@ -6927,7 +6925,7 @@
 
 	if (str != NULL)
 	{
-	    /* Check the argument for spelling. */
+	    // Check the argument for spelling.
 	    while (*str != NUL)
 	    {
 		len = spell_check(curwin, str, &attr, &capcol, FALSE);
@@ -7027,7 +7025,7 @@
     int		keepempty = FALSE;
     int		typeerr = FALSE;
 
-    /* Make 'cpoptions' empty, the 'l' flag should not be used here. */
+    // Make 'cpoptions' empty, the 'l' flag should not be used here.
     save_cpo = p_cpo;
     p_cpo = (char_u *)"";
 
@@ -7055,7 +7053,7 @@
 	while (*str != NUL || keepempty)
 	{
 	    if (*str == NUL)
-		match = FALSE;	/* empty item at the end */
+		match = FALSE;	// empty item at the end
 	    else
 		match = vim_regexec_nl(&regmatch, str, col);
 	    if (match)
@@ -7294,7 +7292,7 @@
     else
 	seconds = (time_t)tv_get_number(&argvars[1]);
     curtime = vim_localtime(&seconds, &tmval);
-    /* MSVC returns NULL for an invalid value of seconds. */
+    // MSVC returns NULL for an invalid value of seconds.
     if (curtime == NULL)
 	rettv->vval.v_string = vim_strsave((char_u *)_("(Invalid)"));
     else
@@ -7321,7 +7319,7 @@
 	else
 	    rettv->vval.v_string = vim_strsave(result_buf);
 
-	/* Release conversion descriptors */
+	// Release conversion descriptors
 	convert_setup(&conv, NULL, NULL);
 	vim_free(enc);
     }
@@ -7378,7 +7376,7 @@
     save_haystack = haystack = tv_get_string_buf_chk(&argvars[0], buf);
     rettv->vval.v_number = -1;
     if (needle == NULL || haystack == NULL)
-	return;		/* type error; errmsg already given */
+	return;		// type error; errmsg already given
 
     if (argvars[2].v_type != VAR_UNKNOWN)
     {
@@ -7408,7 +7406,7 @@
     rettv->v_type = VAR_STRING;
     rettv->vval.v_string = tv2string(&argvars[0], &tofree, numbuf,
 								get_copyID());
-    /* Make a copy if we have a value but it's not in allocated memory. */
+    // Make a copy if we have a value but it's not in allocated memory.
     if (rettv->vval.v_string != NULL && tofree == NULL)
 	rettv->vval.v_string = vim_strsave(rettv->vval.v_string);
 }
@@ -7519,7 +7517,7 @@
 	    }
 	}
 	else
-	    len = slen - nbyte;    /* default: all bytes that are available. */
+	    len = slen - nbyte;    // default: all bytes that are available.
     }
 
     /*
@@ -7563,7 +7561,7 @@
     else if (argvars[2].v_type != VAR_UNKNOWN)
 	len = (int)tv_get_number(&argvars[2]);
     else
-	len = slen - n;	    /* default len: all bytes that are available. */
+	len = slen - n;	    // default len: all bytes that are available.
 
     /*
      * Only return the overlap between the specified part and the actual
@@ -7637,22 +7635,22 @@
 
     rettv->vval.v_number = -1;
     if (needle == NULL || haystack == NULL)
-	return;		/* type error; errmsg already given */
+	return;		// type error; errmsg already given
 
     haystack_len = (int)STRLEN(haystack);
     if (argvars[2].v_type != VAR_UNKNOWN)
     {
-	/* Third argument: upper limit for index */
+	// Third argument: upper limit for index
 	end_idx = (int)tv_get_number_chk(&argvars[2], NULL);
 	if (end_idx < 0)
-	    return;	/* can never find a match */
+	    return;	// can never find a match
     }
     else
 	end_idx = haystack_len;
 
     if (*needle == NUL)
     {
-	/* Empty string matches past the end. */
+	// Empty string matches past the end.
 	lastmatch = haystack + end_idx;
     }
     else
@@ -7786,8 +7784,8 @@
     int		trans;
     int		transerr = FALSE;
 
-    lnum = tv_get_lnum(argvars);		/* -1 on type error */
-    col = (linenr_T)tv_get_number(&argvars[1]) - 1;	/* -1 on type error */
+    lnum = tv_get_lnum(argvars);		// -1 on type error
+    col = (linenr_T)tv_get_number(&argvars[1]) - 1;	// -1 on type error
     trans = (int)tv_get_number_chk(&argvars[2], &transerr);
 
     if (!transerr && lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count
@@ -7819,7 +7817,7 @@
 	mode = tv_get_string_buf(&argvars[2], modebuf);
 	modec = TOLOWER_ASC(mode[0]);
 	if (modec != 't' && modec != 'c' && modec != 'g')
-	    modec = 0;	/* replace invalid with current */
+	    modec = 0;	// replace invalid with current
     }
     else
     {
@@ -7837,48 +7835,48 @@
     switch (TOLOWER_ASC(what[0]))
     {
 	case 'b':
-		if (TOLOWER_ASC(what[1]) == 'g')	/* bg[#] */
+		if (TOLOWER_ASC(what[1]) == 'g')	// bg[#]
 		    p = highlight_color(id, what, modec);
-		else					/* bold */
+		else					// bold
 		    p = highlight_has_attr(id, HL_BOLD, modec);
 		break;
 
-	case 'f':					/* fg[#] or font */
+	case 'f':					// fg[#] or font
 		p = highlight_color(id, what, modec);
 		break;
 
 	case 'i':
-		if (TOLOWER_ASC(what[1]) == 'n')	/* inverse */
+		if (TOLOWER_ASC(what[1]) == 'n')	// inverse
 		    p = highlight_has_attr(id, HL_INVERSE, modec);
-		else					/* italic */
+		else					// italic
 		    p = highlight_has_attr(id, HL_ITALIC, modec);
 		break;
 
-	case 'n':					/* name */
+	case 'n':					// name
 		p = get_highlight_name_ext(NULL, id - 1, FALSE);
 		break;
 
-	case 'r':					/* reverse */
+	case 'r':					// reverse
 		p = highlight_has_attr(id, HL_INVERSE, modec);
 		break;
 
 	case 's':
-		if (TOLOWER_ASC(what[1]) == 'p')	/* sp[#] */
+		if (TOLOWER_ASC(what[1]) == 'p')	// sp[#]
 		    p = highlight_color(id, what, modec);
-							/* strikeout */
+							// strikeout
 		else if (TOLOWER_ASC(what[1]) == 't' &&
 			TOLOWER_ASC(what[2]) == 'r')
 		    p = highlight_has_attr(id, HL_STRIKETHROUGH, modec);
-		else					/* standout */
+		else					// standout
 		    p = highlight_has_attr(id, HL_STANDOUT, modec);
 		break;
 
 	case 'u':
 		if (STRLEN(what) <= 5 || TOLOWER_ASC(what[5]) != 'c')
-							/* underline */
+							// underline
 		    p = highlight_has_attr(id, HL_UNDERLINE, modec);
 		else
-							/* undercurl */
+							// undercurl
 		    p = highlight_has_attr(id, HL_UNDERCURL, modec);
 		break;
     }
@@ -7928,8 +7926,8 @@
     rettv_list_set(rettv, NULL);
 
 #if defined(FEAT_SYN_HL) && defined(FEAT_CONCEAL)
-    lnum = tv_get_lnum(argvars);		/* -1 on type error */
-    col = (colnr_T)tv_get_number(&argvars[1]) - 1;	/* -1 on type error */
+    lnum = tv_get_lnum(argvars);		// -1 on type error
+    col = (colnr_T)tv_get_number(&argvars[1]) - 1;	// -1 on type error
 
     vim_memset(str, NUL, sizeof(str));
 
@@ -7942,7 +7940,7 @@
 	    (void)syn_get_id(curwin, lnum, col, FALSE, NULL, FALSE);
 	    syntax_flags = get_syntax_info(&matchid);
 
-	    /* get the conceal character */
+	    // get the conceal character
 	    if ((syntax_flags & HL_CONCEAL) && curwin->w_p_cole < 3)
 	    {
 		cchar = syn_get_sub_char();
@@ -7960,7 +7958,7 @@
 
 	list_append_number(rettv->vval.v_list,
 					    (syntax_flags & HL_CONCEAL) != 0);
-	/* -1 to auto-determine strlen */
+	// -1 to auto-determine strlen
 	list_append_string(rettv->vval.v_list, str, -1);
 	list_append_number(rettv->vval.v_list, matchid);
     }
@@ -7983,8 +7981,8 @@
     rettv_list_set(rettv, NULL);
 
 #ifdef FEAT_SYN_HL
-    lnum = tv_get_lnum(argvars);		/* -1 on type error */
-    col = (colnr_T)tv_get_number(&argvars[1]) - 1;	/* -1 on type error */
+    lnum = tv_get_lnum(argvars);		// -1 on type error
+    col = (colnr_T)tv_get_number(&argvars[1]) - 1;	// -1 on type error
 
     if (lnum >= 1 && lnum <= curbuf->b_ml.ml_line_count
 	    && col >= 0 && col <= (long)STRLEN(ml_get(lnum))
@@ -8151,15 +8149,15 @@
     fromstr = tv_get_string_buf_chk(&argvars[1], buf);
     tostr = tv_get_string_buf_chk(&argvars[2], buf2);
 
-    /* Default return value: empty string. */
+    // Default return value: empty string.
     rettv->v_type = VAR_STRING;
     rettv->vval.v_string = NULL;
     if (fromstr == NULL || tostr == NULL)
-	    return;		/* type error; errmsg already given */
+	    return;		// type error; errmsg already given
     ga_init2(&ga, (int)sizeof(char), 80);
 
     if (!has_mbyte)
-	/* not multi-byte: fromstr and tostr must be the same length */
+	// not multi-byte: fromstr and tostr must be the same length
 	if (STRLEN(fromstr) != STRLEN(tostr))
 	{
 error:
@@ -8168,7 +8166,7 @@
 	    return;
 	}
 
-    /* fromstr and tostr have to contain the same number of chars */
+    // fromstr and tostr have to contain the same number of chars
     while (*in_str != NUL)
     {
 	if (has_mbyte)
@@ -8192,7 +8190,7 @@
 			    break;
 			}
 		    }
-		    if (*p == NUL)	/* tostr is shorter than fromstr */
+		    if (*p == NUL)	// tostr is shorter than fromstr
 			goto error;
 		    break;
 		}
@@ -8201,9 +8199,9 @@
 
 	    if (first && cpstr == in_str)
 	    {
-		/* Check that fromstr and tostr have the same number of
-		 * (multi-byte) characters.  Done only once when a character
-		 * of in_str doesn't appear in fromstr. */
+		// Check that fromstr and tostr have the same number of
+		// (multi-byte) characters.  Done only once when a character
+		// of in_str doesn't appear in fromstr.
 		first = FALSE;
 		for (p = tostr; *p != NUL; p += tolen)
 		{
@@ -8222,7 +8220,7 @@
 	}
 	else
 	{
-	    /* When not using multi-byte chars we can do it faster. */
+	    // When not using multi-byte chars we can do it faster.
 	    p = vim_strchr(fromstr, *in_str);
 	    if (p != NULL)
 		ga_append(&ga, tostr[p - fromstr]);
@@ -8232,7 +8230,7 @@
 	}
     }
 
-    /* add a terminating NUL */
+    // add a terminating NUL
     (void)ga_grow(&ga, 1);
     ga_append(&ga, NUL);
 
@@ -8316,7 +8314,7 @@
 
     rettv->v_type = VAR_FLOAT;
     if (get_float_arg(argvars, &f) == OK)
-	/* trunc() is not in C90, use floor() or ceil() instead. */
+	// trunc() is not in C90, use floor() or ceil() instead.
 	rettv->vval.v_float = f > 0 ? floor(f) : ceil(f);
     else
 	rettv->vval.v_float = 0.0;
@@ -8392,7 +8390,7 @@
     str[1] = NUL;
     rettv->vval.v_string = vim_strsave(str);
 
-    /* A non-zero number or non-empty string argument: reset mode. */
+    // A non-zero number or non-empty string argument: reset mode.
     if (non_zero_arg(&argvars[0]))
 	curbuf->b_visual_mode_eval = NUL;
 }
@@ -8430,4 +8428,4 @@
 					^ tv_get_number_chk(&argvars[1], NULL);
 }
 
-#endif /* FEAT_EVAL */
+#endif // FEAT_EVAL
diff --git a/src/version.c b/src/version.c
index 4d50222..cc5b4b9 100644
--- a/src/version.c
+++ b/src/version.c
@@ -743,6 +743,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2378,
+/**/
     2377,
 /**/
     2376,