bug#11067: 24.0.94.1; diff-buffer-with-file

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Date: Fri, 23 Mar 2012 21:49:50 -0400
> Cc: Arni Magnusson <arnima@hafro.is>, 11067@debbugs.gnu.org
> 
> ...hmmm... well line 3828 of
> http://git.savannah.gnu.org/cgit/diffutils.git/tree/doc/diffutils.texi
> shows that it's documented in diffutils.

So now we are going to require GNU Diffutils as a prerequisite for
using these Emacs commands?  Somehow, that doesn't sound right to me.