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

[Juri Linkov]

>> Yes, still not perfect.  Maybe then use just one alist entry with more
>> possible values whose names clearly indicate where they are applied like
>>
>> below - bottom
>> above - top
>> left - leftmost
>> right - rightmost
>>
>> The first column is relative to the selected window,
>> the second column is relative to the main window.
>
> This will confuse us and users.  We should try to unify them somehow
> in the sense that terms like below/bottom can be used interchangeably
> - as you asked for up/above and down/below in 'window-in-direction'.

Actually we already have established naming convention:

display-buffer-below-selected
display-buffer-at-bottom

Removing the common prefix gives us the names of alist entries:

below-selected
at-bottom

Using the same naming convention suggests more names:

above-selected
at-top
...