diff --git a/runtime/doc/undo.txt b/runtime/doc/undo.txt
index d271222..2ada2a6 100644
--- a/runtime/doc/undo.txt
+++ b/runtime/doc/undo.txt
@@ -403,4 +403,4 @@
 first put, and repeat the put command for the second register.  Repeat the
 'u.' until you got what you want.
 
- vim:tw=78:ts=8:ft=help:norl:
+ vim:tw=78:ts=8:noet:ft=help:norl: