bug#10300: 24.0.92; 'diff-show-trailing-whitespaces' command

[Eli Zaretskii]

> From: Juanma Barranquero <lekktu@gmail.com>
> Date: Thu, 15 Dec 2011 00:47:22 +0100
> Cc: 10300@debbugs.gnu.org
> 
> 2009-01-10  Dan Nicolaescu  <dann@ics.uci.edu>
> 
>         * diff-mode.el (diff-show-trailing-whitespaces): Remove function.
>         Move setting up whitepace-mode ...
>         (diff-mode): ... here.
>         (diff-mode-menu): Add a menu entry for showing trailing whitespace.
> 
> 
> so it is now a menu entry (that runs `whitespace-mode') instead of a
> command, and the "Diff Mode" info node should be fixed.

And also etc/NEWS should tell this in "incompatible changes" section.