bug#71386: 29.1; Frame is auto-deleted even when it has multiple tabs

[Juri Linkov <juri@linkov.net>]

>>> If I open a frame with multiple tabs, and one of the tabs has a
>>> dedicated window, then kill the buffer with the dedicated window, the
>>> frame is deleted along with its tabs.
>>>
>>> I understand that this is the documented behaviour, however my
>>> expectation is that the tab should be deleted but the frame should
>>> stay when other tabs are available, similar to how the frame is not
>>> deleted if other windows are visible.
>>
>> I'm not sure I agree with you.  Tabs are just saved frame
>> configurations, they are not real windows.  If we make this behavior
>> dependent on tab-bar-mode, we basically introduce an incompatible
>> behavior change in this particular case, which people and Lisp
>> programs out there might not expect or like.
>
> The current behavior of 'replace-buffer-in-windows' has been taken over
> from 'quit-window' which Richard initially designed as
>
>     ;; Get rid of the frame, if it has just one dedicated window
>     ;; and other visible frames exist.
>
> It is not carved in stone but if we want to change it for the tabs case
> we should leave it in place.  So I think that Juri should provide a tabs
> option that has 'quit-restore-window' (which 'replace-buffer-in-windows'
> should call) spare the frame in that case.  Which buffer to show in that
> window instead (especially if it never showed another buffer in its
> whole life) is another question.

Sorry, I don't understand what I should do in tab-bar-mode
for quit-restore-window.  I expected that changes should be
in window.el.