bug#58404: 29.0.50; [PATCH] When killing Emacs from the last client, don't warn about the session having clients

[Eli Zaretskii]

> Date: Mon, 10 Oct 2022 10:49:05 -0700
> Cc: 58404@debbugs.gnu.org
> From: Jim Porter <jporterbugs@gmail.com>
> 
> Attached is a new patch that removes the prompt when called from the 
> last remaining client. I also expanded the docstring to explain why the 
> prompt is there.

LGTM, thanks.