diff --git a/runtime/doc/pi_spec.txt b/runtime/doc/pi_spec.txt
index abe5f11..aaede1e 100644
--- a/runtime/doc/pi_spec.txt
+++ b/runtime/doc/pi_spec.txt
@@ -108,4 +108,4 @@
 
 Good luck!!
 
-vim:tw=78:ts=8:ft=help:norl:
+vim:tw=78:ts=8:noet:ft=help:norl: