Subject: describe-mode should provide a link to the file where the mode is defined

From: [email-masked]
Date: Sun, 06 Mar 2011 13:06:41 +0800

$ emacs -Q .
C-h m
Nowhere does it say
"...mode is defined in `dired.el'."
which one can click.
The other describe-* commands do, but not describe-mode.