bug#66328: 29.1; Incompatible change to `completing-read' breaks existing code

[Eli Zaretskii]

> From: Drew Adams <drew.adams@oracle.com>
> Date: Tue, 3 Oct 2023 22:11:41 +0000
> 
> How did the signature of `completing-read' get changed?  I didn't notice
> any proposal or discussion about this in emacs-devel@gnu.org.  Did I
> just miss it somehow?

It was discussed here:

  https://lists.gnu.org/archive/html/emacs-devel/2022-06/msg00539.html