bug#3578: 23.0.94; when saving some files, diff does not work

"Drew Adams" <[email protected]> Mon, 15 Jun 2009 11:14:06 -0700

Newsgroups	gmane.emacs.bugs,gmane.emacs.pretest.bugs
Message-ID	<[email protected]>

> I believe that the problem was introduced by revision 1.985 
> of files.el, line 4178, that says: (if (null buffer-file-name)
> and should say: (if (null buffer-file-name buf)

You probably mean (if (null (buffer-file-name buf)))

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