Update runtime files
diff --git a/runtime/indent/sas.vim b/runtime/indent/sas.vim
index 9cc9e02..bbbbbf0 100644
--- a/runtime/indent/sas.vim
+++ b/runtime/indent/sas.vim
@@ -2,7 +2,7 @@
 " Language:     SAS
 " Maintainer:   Zhen-Huan Hu <wildkeny@gmail.com>
 " Version:      3.0.3
-" Last Change:  Jun 26, 2018
+" Last Change:  2022 Apr 06
 
 if exists("b:did_indent")
   finish
@@ -12,6 +12,8 @@
 setlocal indentexpr=GetSASIndent()
 setlocal indentkeys+=;,=~data,=~proc,=~macro
 
+let b:undo_indent = "setl inde< indk<"
+
 if exists("*GetSASIndent")
   finish
 endif