Update runtime files
diff --git a/runtime/indent/sass.vim b/runtime/indent/sass.vim
index d6dbf3a..8c0ecd0 100644
--- a/runtime/indent/sass.vim
+++ b/runtime/indent/sass.vim
@@ -1,7 +1,7 @@
" Vim indent file
" Language: Sass
" Maintainer: Tim Pope <vimNOSPAM@tpope.org>
-" Last Change: 2017 Jun 13
+" Last Change: 2022 Mar 15
if exists("b:did_indent")
finish
@@ -12,6 +12,8 @@
setlocal indentexpr=GetSassIndent()
setlocal indentkeys=o,O,*<Return>,<:>,!^F
+let b:undo_indent = "setl ai< inde< indk<"
+
" Only define the function once.
if exists("*GetSassIndent")
finish