bug#18133: Suppressing asynchronous command output

[Eli Zaretskii]

> From: Reuben Thomas <rrt@sc3d.org>
> Date: Sat, 24 Dec 2016 11:11:37 +0000
> Cc: Eli Zaretskii <eliz@gnu.org>, 18133@debbugs.gnu.org
> 
>  To turn this into a minor mode I would do two things:
> 
> ​Please, start from the patch I provided, and read the discussion in previous 
> messages; otherwise, you're
> partly rehashing old conversations.
> 
> In any case, adding a minor mode might be tidier than adding suggestions to 
> display-buffer-alist, but it's worse
> in terms of adding complexity to Emacs. It's not worth it.
> 
> In my view, what I suggested is simply the correct behaviour, and should be 
> the default.
> 
> In Eli's view, we should not change the default unless it proves popular.
> 
> I am therefore seeking a way to make it easier to customize than at present 
> (as you can see, at present it
> requires 10 lines of code, which is 10 times too much).
> 
> ​Any suggestions?​ Eli?

Not sure why this went astray so much.  Let me try bringing it back on
track.

display-buffer-alist is a defcustom.  The issue at hand is to offer
users a way of customizing display-buffer-alist such that buffers
whose names match "*Async Shell Command*" will not be displayed unless
they have something to show the user.

Martin, what can we add to the display-buffer-alist's defcustom to
allow users easy customization to that effect?

Thanks.