diff --git a/runtime/doc/version9.txt b/runtime/doc/version9.txt
index 3473d79..3fe8b2d 100644
--- a/runtime/doc/version9.txt
+++ b/runtime/doc/version9.txt
@@ -41565,6 +41565,8 @@
 -------
 - use 'smoothscroll' logic for CTRL-F and CTRL-B for pagewise scrolling
 - use 'smoothscroll' logic for CTRL-D and CTRL-U for half-pagewise scrolling
+- the default for 'commentstring' contains whitespace padding to have
+  automatic comments look nicer |comment-install|
 
 							*added-9.2*
 Added ~