bug#66283: 30.0.50; which-function-mode: When configured to display in header, and toggling off, then does not remove header

[Eli Zaretskii]

> From: sbaugh@catern.com
> Date: Sat, 21 Oct 2023 14:43:30 +0000 (UTC)
> Cc: Spencer Baugh <sbaugh@janestreet.com>, mekeor@posteo.de,
>       66283@debbugs.gnu.org, stefankangas@gmail.com
> 
> > Thanks, but how about some tests for these fixes?  It's high time
> > which-mode had some test suite, I think.
> 
> Sure, here's a patch including a test.

Thanks, installed on the master branch, and closing the bug.