Update runtime files.
diff --git a/runtime/doc/os_mac.txt b/runtime/doc/os_mac.txt
index 72c0c16..28ebe66 100644
--- a/runtime/doc/os_mac.txt
+++ b/runtime/doc/os_mac.txt
@@ -179,4 +179,4 @@
 from hanging at runtime.
 
 
- vim:tw=78:ts=8:ft=help:norl:
+ vim:tw=78:ts=8:noet:ft=help:norl: