bug#52126: Problematic characters in info node names

[Eli Zaretskii]

> From: Protesilaos Stavrou <info@protesilaos.com>
> Cc: larsi@gnus.org, stefan@marxist.se, 52126@debbugs.gnu.org,
>  kyle@kyleam.com, rgm@gnu.org
> Date: Mon, 29 Nov 2021 21:32:44 +0200
> 
> >> 2. This affects the emacs-28 branch.  Should I patch that as well?
> >
> > It's up to you.  It isn't important either way.
> 
> Both patches are attached.  Each file name contains the Emacs version it
> belongs to.
> 
> I can push directly from here if you think everything is in order.

Feel free to push to any of the two branches.

Thanks.