updated for version 7.3.585
Problem:    Calling changed_bytes() too often.
Solution:   Move changed_bytes() out of a loop. (Tor Perkins)
diff --git a/src/edit.c b/src/edit.c
index 78b4d1c..bcae928 100644
--- a/src/edit.c
+++ b/src/edit.c
@@ -6350,10 +6350,8 @@
 			 * add the additional whitespace needed after the
 			 * comment leader for the numbered list.  */
 			for (i = 0; i < padding; i++)
-			{
 			    ins_str((char_u *)" ");
-			    changed_bytes(curwin->w_cursor.lnum, leader_len);
-			}
+			changed_bytes(curwin->w_cursor.lnum, leader_len);
 		    }
 		    else
 		    {