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

[Dmitry Gutov]

Hi!

On 14.06.2020 21:29, Theodor Thornhill wrote:
> Attached is a patch to change the default behaviour of 'project-shell'.
>
> My use case is:
>
> - Edit some file in some project.
> - 'M-x project-shell'
> - Do something, then "C-x 0"
> - Oops forgot to read output.
> - 'M-x project-shell'
> - See the same buffer.
>
> Right now 'project-shell' opens a new buffer every time it is invoked. Now I 
> have to find it in the buffer list. Putting previous behaviour on universal 
> argument will in addition enable this workflow
>
> - Edit some file in some project.
> - 'M-x project-shell'
> - 'C-u M-x project-shell'
> - Now emacs is split it two, with two separate shell processes
>
>
> In addition, I let default name be *'project-root-dir'-shell* to signify this 
> shell buffer to be unique from other shell buffers invoked by 'M-x shell'.

Sounds good to me.

Juri, will you the review?

NB: It's difficult for me to open the attachment because it has to file 
extension.