bug#26272: default-directory: Remark that it must be a directory name

[Eli Zaretskii]

> From: Tino Calancha <tino.calancha@gmail.com>
> Cc: 26272@debbugs.gnu.org, tino.calancha@gmail.com
> Date: Tue, 28 Mar 2017 00:15:07 +0900
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> From: Tino Calancha <tino.calancha@gmail.com>
> >> Date: Mon, 27 Mar 2017 19:13:05 +0900
> >> 
> >> 
> >> The docstring of `file-name-as-directory' suggests that is
> >> important that `default-directory' be a directory name, i.e.,
> >> for instance in GNU/Linux ends with '/'.  The docstring of
> >> `default-directory' doesn't mention it.
> >
> > Didn't we discuss that at some point in the past?
> I don't remember it.  Maybe with another person.

No, I meant on emacs-devel, not with you personally.

> I have changed
> 'and in a slash' with 'end in a slash'.

Oops ;-)