runtime: Set b:undo_ftplugin where missing (#12943)
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/ftplugin/art.vim b/runtime/ftplugin/art.vim
index c501a99..41b02a9 100644
--- a/runtime/ftplugin/art.vim
+++ b/runtime/ftplugin/art.vim
@@ -3,6 +3,7 @@
" Maintainer: Dorai Sitaram <ds26@gte.com>
" URL: http://www.ccs.neu.edu/~dorai/vimplugins/vimplugins.html
" Last Change: Apr 2, 2003
+" 2023 Aug 28 by Vim Project (undo_ftplugin)
" Only do this when not done yet for this buffer
if exists("b:did_ftplugin")
@@ -13,3 +14,5 @@
setl lw-=if
setl lw+=def-art-fun,deffacts,defglobal,defrule,defschema,for,schema,while
+
+let b:undo_ftplugin ..= " | setl lw<"