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: Sat, 04 Sep 2021 23:43:05 -0400
> 
> Here's a way: after the init files finish, look at the value of the
> variable, and if it does not equal the default, and this value was not
> properly installed with the :set method, invoke that variable's :set
> method.

How would we know which variables to look at?