patch 8.2.3914: various spelling mistakes in comments

Problem:    Various spelling mistakes in comments.
Solution:   Fix the mistakes. (Dominique Pellé, closes #9416)
diff --git a/src/drawline.c b/src/drawline.c
index 7125b80..8a042ed 100644
--- a/src/drawline.c
+++ b/src/drawline.c
@@ -2258,7 +2258,7 @@
 
 			// Make sure, the highlighting for the tab char will be
 			// correctly set further below (effectively reverts the
-			// FIX_FOR_BOGSUCOLS macro
+			// FIX_FOR_BOGSUCOLS macro).
 			if (n_extra == tab_len + vc_saved && wp->w_p_list
 						&& wp->w_lcs_chars.tab1)
 			    tab_len += vc_saved;
@@ -2938,7 +2938,7 @@
 #if defined(FEAT_RIGHTLEFT)
 	    if (has_mbyte && wp->w_p_rl && (*mb_char2cells)(mb_c) > 1)
 	    {
-		// A double-wide character is: put first halve in left cell.
+		// A double-wide character is: put first half in left cell.
 		--off;
 		--col;
 	    }