Eli Zaretskii <eliz@gnu.org> writes:

>
> Thanks.  This no longer applies to the current master, so please
> resubmit, and I will install.
>

Thanks, I've rebased the patch.

>> The NEWS entry explains how users could show this information in their
>> *Help* buffers, if they want.
>
> Maybe this part should be also in the user manual?

I've added some information to the user manual.  I see we don't document
help-fns-describe-function-functions in the user manual at all, should
we do it?  Customizing what is displayed in describe-function buffers
may be something that users want to do.  But perhaps we need to make the
hook part of the Customize interface first, I don't know.