bug#21816: elisp-mode-tests fails on a case-preserving filesystem

[Juanma Barranquero <lekktu@gmail.com>]

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On Tue, Nov 3, 2015 at 5:34 PM, Eli Zaretskii <eliz@gnu.org> wrote:

> Both forms (and some additional ones) are perfectly canonical.

It would be a matter of choosing one.

> This isn't a xref-specific problem, so I think it should have a more
> general solution that any package could use.  It's not reasonable to
> expect from every Emacs developer to be an expert on subtle aspects of
> comparing Windows file names.  We should provide a tested solution for
> that.

That would be helpful in general, but wouldn't help with the case that now,
to compare two xref-location instances, you have to delve into their
innards. Different problems.

<rambling>Unless you're proposing a variant of `equal' with better
file-comparing abilities... which doesn't make sense because
`equal-super-duper` wouldn't have a way to know that some things are
filenames and not just arbitrary strings that match a filename just by
happenstance...</rambling>

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