bug#43375: 26.1: file-directory-p returns t for empty string

[Boruch Baum]

On 2020-09-13 15:06, Andreas Schwab wrote:
> On Sep 13 2020, Boruch Baum wrote:
>
> > I was expecting the follow to return nil, but it returns t
> >
> >   (file-directory-p "")
>
> This is not a bug, as Emacs always works with expanded and canonicalized
> file names (the result of applying expand-file-name).

Then the docstring could be clearer and say "Return t if the expansion
of FILENAME names an existing directory" instead of simply the current
"Return t if FILENAME names an existing directory". Would that be an
acceptable change?

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