runtime: Set b:undo_ftplugin where missing (#12943)
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/ftplugin/dune.vim b/runtime/ftplugin/dune.vim
index 86c99c0..6e20a8f 100644
--- a/runtime/ftplugin/dune.vim
+++ b/runtime/ftplugin/dune.vim
@@ -3,8 +3,9 @@
" Anton Kochkov <anton.kochkov@gmail.com>
" URL: https://github.com/ocaml/vim-ocaml
" Last Change:
-" 2018 Nov 3 - Added commentstring (Markus Mottl)
-" 2017 Sep 6 - Initial version (Etienne Millon)
+" 2023 Aug 28 - Added undo_ftplugin (Vim Project)
+" 2018 Nov 03 - Added commentstring (Markus Mottl)
+" 2017 Sep 06 - Initial version (Etienne Millon)
if exists("b:did_ftplugin")
finish
@@ -18,3 +19,5 @@
setl comments=:;
setl iskeyword+=#,?,.,/
+
+let b:undo_ftplugin = "setl lisp< cms< com< isk<"