bug#44611: Prefix arg for xref-goto-xref

[Juri Linkov]

>> +(defun xref-pop-marker-stack (&optional kill)
>> +  "Pop back to where \\[xref-find-definitions] was last invoked.
>> +With prefix argument KILL non-nil, kill the previous buffer instead of
>> +burying it."
>
> What is "the previous buffer" in this context?  The doc string leaves
> that unexplained, and thus may confuse the reader.

Maybe this is clearer: "kill the buffer that was current before popping back."

> (I don't object to such a feature, but I really don't understand the
> urge to kill Emacs buffers just because they were needed temporarily.
> Why is that important?)

The problem is that such temporary file buffers are saved
to the desktop file and dangling in the buffer list forever.