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

From: Juri Linkov
Subject: bug#33870: 27.0.50; xref-goto-xref not configurable
Date: Thu, 27 Dec 2018 01:17:00 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (x86_64-pc-linux-gnu)

>> But still there is one xref command, namely `xref-goto-xref' bound to
>> RET in the *xref* buffer that always displays the buffer in the
>> predefined window, and there is no way to change this behavior.
> How would you like to change this behavior, and why?  There are quite
> a few tricky use cases, which took us some of time to get right, and I
> wouldn't like to break them.

Since we have a convention that code displaying a buffer in the
window have to obey display actions that are customizable by
`display-buffer-alist', `display-buffer-overriding-action',
and other display related variables (e.g. like implemented
recently with switch-to-buffer-obey-display-actions),
I see no reason why *xref* should differ from *grep* or *Occur*.
It should not involve more complexity than necessary.

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