I quite often want to email diffs of files I don't have write access to, so I visit the file, write it to /tmp, then edit it, save it, and go to /tmp to run diff between the file and its backup.  But Emacs doesn't make backups of files in /tmp, and there doesn't seem to be any way of asking it to via the customize interface.
<br><br>The best I&#39;ve found is to:<br>&nbsp; (setq backup-enable-predicate &#39;(lambda (file) t))<br><br><br><br>Suggestions:<br>1) make that the default value - why not write backups in /tmp?<br>2) offer a way for the user to customize the behavior without resorting to writing Emacs LISP code
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