bug#41858: 28.0.50; [PATCH]: Make project-shell use universal argument

[Eli Zaretskii]

> Date: Thu, 18 Jun 2020 09:57:55 +0000
> From: Theodor Thornhill <theo@thornhill.no>
> Cc: 41858@debbugs.gnu.org, Dmitry Gutov <dgutov@yandex.ru>
> 
> Change default behaviour of 'project-shell'
> 
> * lisp/progmodes/project.el (project-shell):   If a shell already is open, 
> pop to that buffer. Otherwise, or if universal argument is used, open a 
> subsequent shell buffer and jump to it.

Please always mention the bug number, if there is any, in the commit
log message.  A reference to a bug makes it easy to find discussions
relevant to a change, which is very important when one needs to
understand better the rationale for a change.

Also, please format the log message according to our conventions, as
described in CONTRIBUTE.

TIA.

>  (defun project-shell ()
> -  "Open Shell in the current project."
> +  "Open Shell in the current project.

This doesn't say enough about what the command does.  How about

  Start an inferior shell in the current project's root directory.