Update runtime files
diff --git a/runtime/indent/postscr.vim b/runtime/indent/postscr.vim
index 0691cd2..66094e3 100644
--- a/runtime/indent/postscr.vim
+++ b/runtime/indent/postscr.vim
@@ -2,8 +2,8 @@
" Language: PostScript
" Maintainer: Mike Williams <mrw@netcomuk.co.uk> (Invalid email address)
" Doug Kearns <dougkearns@gmail.com>
-" Last Change: 2nd July 2001
-"
+" Last Change: 2022 Apr 06
+
" Only load this indent file when no other was loaded.
if exists("b:did_indent")
@@ -14,6 +14,8 @@
setlocal indentexpr=PostscrIndentGet(v:lnum)
setlocal indentkeys+=0],0=>>,0=%%,0=end,0=restore,0=grestore indentkeys-=:,0#,e
+let b:undo_indent = "setl inde< indk<"
+
" Catch multiple instantiations
if exists("*PostscrIndentGet")
finish