bug#24235: 25.1.50; `describe-bindings' request: show `??' definitions

[Drew Adams]

> The calling sequence for this command is slightly convoluted, but it
> turns out that help.el calls basically
>   (describe-buffer-bindings buffer nil nil)
> which is a C function (but why?) which inserts all the
> 
> C-n           next-line
> C-o           open-line
> C-H-w         ??
> 
> stuff, which is then post-processed to add the xref links.  So at the
> point where the xref is added, then there's no feasible way to
> determine what the ?? referred to, really, without redoing the work the C
> function had already done...
> 
> I think.
> 
> Anybody?

I don't have a solution suggestion.  But maybe
a start would be to move this from C to Lisp?
(Just a suggestion.  Dunno whether there's a
good reason why it's still in C.)