bug#66390: `man' allows to inject arbitrary shell code

[Eli Zaretskii]

> From: Stefan Kangas <stefankangas@gmail.com>
> Date: Tue, 10 Oct 2023 07:43:00 +0000
> Cc: manikulin@gmail.com, 66390@debbugs.gnu.org, michael.albinus@gmx.de
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > what happens with command (man "[") in this case?
> 
> It works fine here with that patch.  IOW, I get the expected man page
> 
>      test, [ – condition evaluation utility

Does it also work correctly in all the scenarios described in
bug#64795, including completion?