updated for version 7.3.541

Problem:    When joining lines comment leaders need to be removed manually.
Solution:   Add the 'j' flag to 'formatoptions'. (Lech Lorens)

runtime/doc/change.txt

@@ -1522,6 +1522,12 @@ B	When joining lines, don't insert a space between two multi-byte
 	characters.  Overruled by the 'M' flag.
 1	Don't break a line after a one-letter word.  It's broken before it
 	instead (if possible).
+j	Where it makes sense, remove a comment leader when joining lines.  For
+	example, joining:
+		int i;   // the index ~
+		         // in the list ~
+	Becomes:
+		int i;   // the index in the list ~
 
 
 With 't' and 'c' you can specify when Vim performs auto-wrapping: