bug#24368: 25.1; Assertion failure in attach_marker

[Eli Zaretskii]

> Date: Wed, 07 Sep 2016 16:52:05 +0200
> From: martin rudalics <rudalics@gmx.at>
> CC: 24368@debbugs.gnu.org
> 
>  > Btw, it would be good to have all your test cases in the test suite.
> 
> I've never written anything for the test suite.  Would the attached file
> fit?

Yes, LGTM.  Thanks.

One comment: to make the tests future-proof, bind test-quoting-style
to a specific value that will cause the *Help* buffer have the
non-ASCII quotes.