[LyX/master] Python 3.13 removed the pipes module from the standard library

[José Matos]

On Sun, 2024-08-25 at 09:14 +0000, José Matos wrote:
> commit d06a034578da4b20fb26e53ff983a77ca90bd07c
> Author: José Matos <jamatos at lyx.org>
> Date:   Sun Aug 25 10:14:18 2024 +0100
> 
>     Python 3.13 removed the pipes module from the standard library
>     
>     That module was a wrapper over the popen module and it was
> scheduled to be removed in Python 3.11.
>     
>     This code is also compatible with Python 2.

@Riki candidate for 2.4.2.

This change seems straightforward but, as usual, things can go wrong.
:-)

Best regards,
-- 
José Abílio