bug#63815: 29.0.91; Bind `M-n' in `Info-mode-map' to `clone-buffer'

[Drew Adams]

> > I see.  Why not (also) `M-n', like elsewhere?
> > Why not treat *Help* like *info* and *Man __*?
> 
> Actually, 'C-x x n' is the global keybinding.  Here is what Help says:
> 
>   C-x x n runs the command clone-buffer (found in global-map).
> 
>   It is bound to M-n and C-x x n.

Is that `M-n' binding new for Emacs 30? I don't see it in the 29 pretest (emacs 
-Q).  Anyway, if an M-n binding has already been added then (great) please 
close this bug.  Thx.