Update runtime files.
diff --git a/runtime/doc/develop.txt b/runtime/doc/develop.txt
index 20a623f..b1b3cc4 100644
--- a/runtime/doc/develop.txt
+++ b/runtime/doc/develop.txt
@@ -563,4 +563,4 @@
 Note that some compilers cannot handle long lines or strings.  The C89
 standard specifies a limit of 509 characters.
 
- vim:tw=78:ts=8:ft=help:norl:
+ vim:tw=78:ts=8:noet:ft=help:norl: