Update runtime files
diff --git a/runtime/indent/treetop.vim b/runtime/indent/treetop.vim
index 42ec1c8..6c39c69 100644
--- a/runtime/indent/treetop.vim
+++ b/runtime/indent/treetop.vim
@@ -1,7 +1,8 @@
" Vim indent file
-" Language: Treetop
-" Previous Maintainer: Nikolai Weibull <now@bitwi.se>
-" Latest Revision: 2011-03-14
+" Language: Treetop
+" Maintainer: Doug Kearns <dougkearns@gmail.com>
+" Previous Maintainer: Nikolai Weibull <now@bitwi.se>
+" Last Change: 2022 April 25
if exists("b:did_indent")
finish
@@ -12,6 +13,8 @@
setlocal indentkeys=0{,0},!^F,o,O,=end
setlocal nosmartindent
+let b:undo_indent = "setl inde< indk< si<"
+
if exists("*GetTreetopIndent")
finish
endif