bug#10489: 24.0.92; dired-do-copy may create infinite directory hierarchy

[Drew Adams]

Just a quick question about this:

>> +       (equal (file-attributes (file-truename (expand-file-name file1)))
>> +              (file-attributes (file-truename (expand-file-name file2))))))
>
> I don't understand why you use expand-file-name here:
> file-truename does it for you anyway.

That's true, but only for Emacs 24+.  Is there any chance that this code will be
used (say by Tramp) with Emacs < 24, where `file-truename' does not expand a
relative file name?