bug#60758: 29.0.60; while-let uses if-let* convention in contradiction to the docstring

[Eli Zaretskii]

> From: Michael Heerdegen <michael_heerdegen@web.de>
> Cc: Eli Zaretskii <eliz@gnu.org>,  mail@daniel-mendler.de,
>   60758@debbugs.gnu.org
> Date: Sat, 14 Jan 2023 23:13:55 +0100
> 
> Sean Whitton <spwhitton@spwhitton.name> writes:
> 
> > We should fix the docstring or the code; there's still a bug if I just
> > revert my change.  I haven't reviewed the old thread but it sounds like
> > a decision was already taken to fix the docstring instead.
> > Do you agree?  If so, I'll replace my change.
> 
> I'm not Eli, but I think you should fix the docstring.

I agree.