Ping,

Hoping someone can take a look at this bug I reported a week ago.  Here
are two very simple Emacs -Q recipes that demonstrate it.

   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:

   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.

This is fixed by the patches that I reattach after minor tweaks. The
general idea is to have the *xref*, whose sudden appearance is hard to
predict, obtrude as little as possible on the user's window
configuration.

João