patch 8.0.1787: cannot insert the whole cursor line

Problem:    Cannot insert the whole cursor line.
Solution:   Make CTRL-R CTRL-L work. (Andy Massimino, closes #2857)
diff --git a/src/ex_getln.c b/src/ex_getln.c
index 64914aa..0124098 100644
--- a/src/ex_getln.c
+++ b/src/ex_getln.c
@@ -3299,7 +3299,8 @@
     /* check for valid regname; also accept special characters for CTRL-R in
      * the command line */
     if (regname != Ctrl_F && regname != Ctrl_P && regname != Ctrl_W
-	    && regname != Ctrl_A && !valid_yank_reg(regname, FALSE))
+	    && regname != Ctrl_A && regname != Ctrl_L
+	    && !valid_yank_reg(regname, FALSE))
 	return FAIL;
 
     /* A register containing CTRL-R can cause an endless loop.  Allow using
diff --git a/src/ops.c b/src/ops.c
index 0902b04..9af466b 100644
--- a/src/ops.c
+++ b/src/ops.c
@@ -1573,6 +1573,14 @@
 	    *allocated = TRUE;
 	    return TRUE;
 
+	case Ctrl_L:		/* Line under cursor */
+	    if (!errmsg)
+		return FALSE;
+
+	    *argp = ml_get_buf(curwin->w_buffer,
+			curwin->w_cursor.lnum, FALSE);
+	    return TRUE;
+
 	case '_':		/* black hole: always empty */
 	    *argp = (char_u *)"";
 	    return TRUE;
diff --git a/src/testdir/test_cmdline.vim b/src/testdir/test_cmdline.vim
index ff0756c..a79f276 100644
--- a/src/testdir/test_cmdline.vim
+++ b/src/testdir/test_cmdline.vim
@@ -306,6 +306,9 @@
   call feedkeys("ft:aaa \<C-R>\<C-F> bbb\<C-B>\"\<CR>", 'tx')
   call assert_equal('"aaa /tmp/some bbb', @:)
 
+  call feedkeys(":aaa \<C-R>\<C-L> bbb\<C-B>\"\<CR>", 'tx')
+  call assert_equal('"aaa '.getline(1).' bbb', @:)
+
   set incsearch
   call feedkeys("fy:aaa veryl\<C-R>\<C-W> bbb\<C-B>\"\<CR>", 'tx')
   call assert_equal('"aaa verylongword bbb', @:)
diff --git a/src/version.c b/src/version.c
index 52b5436..19b83ac 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1787,
+/**/
     1786,
 /**/
     1785,