bug#33870: 27.0.50; xref-goto-xref not configurable

[Juri Linkov]

>     Here are two very simple Emacs -Q recipes that demonstrate [the bug]

Thanks for the recipes.

>        emacs -Q
>        C-x 3 [split-window-right]
>        C-x 2 [split-window-below]
>        M-. xref-backend-definitions RET [xref-find-definitions]
>        C-n [next-line]
>        RET [xref-goto-xref]
>      
>     Expected the definition to be found in the original window where I
>     pressed M-. but instead it was found in another. Another case:

It could help to try using 'get-mru-window'.  Please ask Martin
if there is a display action that uses 'get-mru-window', or how
to temporarily change the default behavior from 'get-lru-window'
to 'get-mru-window'.

>        emacs -Q
>        C-x 4 . xref-backend-definitions RET 
> [xref-find-definitions-other-window]
>        C-n
>        RET
>      
>     Expected the definition to be found in some other window, different
>     from the one I pressed M-. on. Instead went to the same one. Also,
>     in both situations, expected the window configuration to be the same
>     as if I had searched for, say, xref-backend-functions [which only
>     has a single definition].

This can be configured with the display buffer alist
`(inhibit-same-window . t)'.