Update runtime files
diff --git a/runtime/indent/tcl.vim b/runtime/indent/tcl.vim
index eafb8dd..c35150d 100644
--- a/runtime/indent/tcl.vim
+++ b/runtime/indent/tcl.vim
@@ -1,8 +1,8 @@
" Vim indent file
-" Language: Tcl
-" Latest Update: Chris Heithoff <chrisheithoff@gmail.com>
+" Language: Tcl
+" Maintainer: Chris Heithoff <chrisheithoff@gmail.com>
" Previous Maintainer: Nikolai Weibull <now@bitwi.se>
-" Latest Revision: 2018-12-05
+" Last Change: 24 Sep 2021
if exists("b:did_indent")
finish
@@ -13,6 +13,8 @@
setlocal indentkeys=0{,0},!^F,o,O,0]
setlocal nosmartindent
+let b:undo_indent = "setl inde< indk< si<"
+
if exists("*GetTclIndent")
finish
endif