bug#71566: 30.0.50; test-custom-opts shows errors

[Eli Zaretskii]

> Date: Sat, 15 Jun 2024 10:31:26 +0200
> From:  Michael Albinus via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> 
> --8<---------------cut here---------------start------------->8---
> # make -C test test-custom-opts
> ...
> Test check-for-wrong-custom-opts condition:
>     (ert-test-failed
>      ((should (null (cus-test-opts t))) :form
>       (null
>        ((php-ts-mode-ws-workers :type-error nil ...)
>       (org-src-lang-modes :type-error ... ...)
>       (php-ts-mode-php-config :type-error nil ...)
>       (php-ts-mode-ws-document-root :type-error nil ...)
>       (php-ts-mode-ws-port :type-error nil ...)))
>       :value nil))
>    FAILED  1/1  check-for-wrong-custom-opts (134.958959 sec) at 
> misc/test-custom-opts.el:33
> --8<---------------cut here---------------end--------------->8---

How does one get a human-readable description of the problems with
each of the above defcustoms?  Without a way of getting such a
description, this test is utterly useless, and should never be run!