bug#46397: 27.1; Cannot delete buffer pointing to a file in a path that includes a file

[Matt Armstrong]

Eli Zaretskii <eliz@gnu.org> writes:

> Thanks, I have just two minor comments:
>
>   . I'd prefer a slightly different warning text, see below
>   . We need this change to be reflected in NEWS and perhaps in the manual

Thank you for the review Eli.  I've incorporated your feedback in the
attached patches.

I made the warning message even more terse than you suggested because
before doing so the warnings looked like this:

    Warning (unlock-file): Error unlocking file Unlocking file:
    Permission denied, /tmp/inaccessible/foo, ignored [Disable showing]
    [Disable logging]

...which says "unlock file" too many times.  With the current patch it
is a little bit better:

    Warning (unlock-file): Unlocking file: Permission denied,
    /tmp/inaccessible/foo, ignored [Disable showing] [Disable logging]

The "Unlocking file: Permission denied, /tmp/inaccessible/foo" is a form
all `file-error' conditions have.  Most relevant here is the "Unlocking
file" prefix, which the C level API that generates these errors makes
difficult to omit.