bug#31191: 26.1; [PATCH] Improve docstring of start-process-shell-command

[Noam Postavsky]

Damien Cassou <damien@cassou.me> writes:

> * lisp/subr.el (start-process-shell-command): Add recommended
>   signature to docstring. This hides the argument ARGS whose use is
>   discouraged. This also makes the argument COMMAND visible so the
>   user understands what the docstring is referring to.

> +\(fn NAME BUFFER COMMAND)"
>    (declare (advertised-calling-convention (name buffer command) "23.1"))

I think this is redundant since advertised-calling-convention already
does the same.