bug#48072: 28.0.50: dired-read-shell-command: handle empty input properly [PATCH]

[Eli Zaretskii]

> Date: Tue, 27 Apr 2021 15:32:53 -0400
> From: Boruch Baum <boruch_baum@gmx.com>
> Cc: 48072@debbugs.gnu.org
> 
> > > validates the entered command as a valid shell executable.
> >
> > This is certainly a mistake: a valid shell command doesn't have to be
> > a file that executable-find is able to find.  Shells are known to
> > support all kinds of internal and magic commands.
> 
> My testing indicates otherwise.

Would you care to share the details of that testing, please?