bug#21695: 25.0.50; Change most occurrences of `setq' in Emacs manual to `customize-set-variable'? Really?

[Eli Zaretskii]

> From: Richard Stallman <rms@gnu.org>
> Cc: hmelman@gmail.com, 21695@debbugs.gnu.org
> Date: Tue, 07 Sep 2021 23:23:49 -0400
> 
>   > How would we know which variables to look at?
> 
> We would determine which variables could actually have a problem.
> 
> 1. Get the list of variables that use :set.
> 
> 2. For each of those variables, see if it is used in any source file
> other than the one that contains the defcustom.  A script can do this.

"Any source file" should include all the Lisp files installed on the
user's machine, right?  So such a script would need to be run every
startup (because the installed files can change)?

Perhaps it would be better to walk the obarray instead?