bug#56974: 29.0.50; Missing documentation for former subr-x macros

[Eli Zaretskii]

> From: Philip Kaludercic <philipk@posteo.net>
> Date: Thu, 04 Aug 2022 13:06:20 +0000
> 
> 
> As far as I see, if-let, when-let, thread-first, ... were moved from
> subr-x.el to subr.el last April (b05a103e).  But there appears to be no
> documentation in (I'd assume) lispref/controls.texi.  My understanding
> was that these macros were not documented in the Elisp manual as they
> were just part of subr-x, as the comment in the subr-x header indicates
> 
>     ;; Do not document these functions in the lispref.
>     ;; https://lists.gnu.org/r/emacs-devel/2014-01/msg01006.html
> 
> So should they be documented now?

Yes, they should be.