bug#57885: [PATCH] Add a command to restart the Python shell

[Eli Zaretskii]

> From: Augusto Stoffel <arstoffel@gmail.com>
> Date: Sat, 17 Sep 2022 19:09:40 +0200
> 
> +(defun python-shell-restart (&optional show)
> +  "Restart the Python shell.
> +With a prefix argument, also SHOW the buffer."

Our style for the second sentence is

  Optional argument SHOW (interactively, the prefix argument), if
  non-nil, means also display the Python shell buffer.

That is, document the argument both for calls from Lisp and for
interactive invocations.

Thanks.