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

[Eli Zaretskii]

> Date: Wed, 28 Apr 2021 05:50:54 -0400
> From: Boruch Baum <boruch_baum@gmx.com>
> Cc: Eli Zaretskii <eliz@gnu.org>, 48072@debbugs.gnu.org
> 
> I could restrict the check to the preparation of list of completion
> candidates for the defaults put into the mini-buffer history (already
> done in diredc, as an advice around function dired-guess-default), and
> give dired users feedback when a command returns an error condition (on
> this week's plan anyway).

I'm not sure I understand what you are suggesting.  Do you mean set up
the completion candidates so that they would only include executable
files found on the system, but allow users also to type commands that
are not among the completion candidates?  I think this could be
confusing, and I don't think we have a precedent for such a behavior
elsewhere.