--- a/tests/test-extension.t	Wed Jan 20 20:24:20 2010 +0200
+++ b/tests/test-extension.t	Tue May 10 13:19:05 2011 +0200
@@ -254,6 +254,8 @@
       compared to the working directory, and, when no revisions are specified,
       the working directory files are compared to its parent.
   
+  use "hg help -e extdiff" to show help for the extdiff extension
+  
   options:
   
    -p --program CMD          comparison program to run