bug#25025: python-shell-calculate-command is wrong

[Eli Zaretskii]

> From: Noam Postavsky <npostavs@users.sourceforge.net>
> Date: Sat, 26 Nov 2016 19:50:40 -0500
> Cc: Clément Pit--Claudel <clement.pit@gmail.com>, 
>       25025@debbugs.gnu.org
> 
> >> I think the whole command should be quoted with
> >> combine-and-quote-strings to balance the call to
> >> split-string-and-unquote.
> >
> > Why not remove both of those calls?  Do you understand why they are
> > needed in that case?
> 
> Well, CMD can also come from user input, so we would need some way for
> the user to specify a list of arguments. Currently that can work by
> entering a string that would be split by split-string-and-unquote.

Why does it need to be split?  A shell command can (even should) be
handed to the shell as a single string.