runtime(asm): missing setlocal in indent plugin (#14658)


Signed-off-by: Marc Sven Schulte <167623652+msschulte@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/indent/asm.vim b/runtime/indent/asm.vim
index 4efa766..054612b 100644
--- a/runtime/indent/asm.vim
+++ b/runtime/indent/asm.vim
@@ -13,7 +13,7 @@
 setlocal indentexpr=s:getAsmIndent()
 setlocal indentkeys=<:>,!^F,o,O
 
-let b:undo_indent = "indentexpr< indentkeys<"
+let b:undo_indent = "setlocal indentexpr< indentkeys<"
 
 function! s:getAsmIndent()
   let line = getline(v:lnum)