bug#36767: 26.1; request: add more quick keys to the *Help* buffer

[Lars Ingebrigtsen]

ndame <emacsuser@freemail.hu> writes:

> The Help buffer shows a link to the source code where the symbol is
> defined. Add the currently unbound key 's' to quickly visit the source
> code without having to navigate to the link.
>
> Also, the user may want to read more about the symbol if it is
> a built in one, so add a quick way to visit the Info page
> of the symbol which Help is shown. The currently unbound key 'i' is
> suitable for this purpose.

Makes sense to me -- you can tab to the button, and `C-h S' works, but
both are more fiddly, so I've added these commands to Emacs 28.

Which was unexpectedly quite a lot of work, since the *Help* buffers
don't really seem to have any data available to say what they're about.  

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no