Subject: bug#13305: 24.2; describe-function gives incorrect function location information (for functions changed in a hook?)

From: Stefan Monnier <[email-masked]>
Date: Sun, 30 Dec 2012 21:57:42 -0500

>     Basically, this replaces the built-in version of
> rmail-summary-output with a patched version; the patching is done only

Don't do that.  Use defadvice or advice-add instead.

        Stefan