bug#77928: Regression in Emacs pretest 31.0.90

> From: Roshan Shariff <[email protected]>
> Date: Mon, 27 Jul 2026 11:13:40 -0600
> Cc: [email protected], [email protected], [email protected], 
> 	[email protected]
> 
> On Mon, 27 Jul 2026 at 10:00, Eli Zaretskii <[email protected]> wrote:
> > However, I could perhaps agree to try this proposal of yours:
> 
> Just to be clear, this was exactly the (default) behaviour of
> :custom-face before this patch. I can prepare another patch to go back
> to that behaviour and hopefully document things better this time. We
> would simply be removing the optional last argument that allows the
> different behaviour that this patch forces.

I thought you were saying that it would also make the original use
case better?  If not, why not do that as well?  I'd prefer not to
revert the change completely.