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

[martin rudalics]

> Please just add to a new file:
>
> ;; Local Variables:
> ;; foo: bar
> ;; End:
>
> Visiting it in a single-window wide frame splits it horizontally
> instead of displaying Local Variables at the bottom, as it correctly
> does when windows are already horizontally split before visiting the file.

It's a silly bug in 'display-buffer-at-bottom'.  Please try with

             (let ((split-height-threshold 0))

instead of

             (let (split-height-threshold)

Thanks, martin