bug#16333: 24.3.50; Info manuals: link defined terms to their glossary entries

[Eli Zaretskii]

> Date: Wed, 28 Oct 2020 23:52:32 -0700 (PDT)
> From: Drew Adams <drew.adams@oracle.com>
> Cc: 16333@debbugs.gnu.org
> 
> It turns out that the text need not exactly start with
> "mouse-2".

Yes.

> Dunno where that text transformation is implemented
> (in C?) - I didn't find it in the Lisp.

It's in mouse-fixup-help-message.