bug#38354: 27.0.50; Implement display action display-buffer-in-tab

[martin rudalics]

> I have no preference, but don't understand why the implementation
> should provide only one way, but not another.  Is it what users expect?

IIRC that's how we interpreted the term "reuse" in the past - do not
change configurations if we can avoid it.  But I have no preference
either.

> It should close the tab only on quitting the window with the buffer
> whose displaying created the tab.  For example, when
> 'switch-to-buffer-other-tab' creates a new tab, then quitting
> its buffer should close the tab.
>
> This is the same logic as for creating/deleting the window, e.g.
> 'C-h f car RET' creates a window, but typing 'q' in Help buffer
> deletes the window.  'q' in a new tab should close it as well.

OK.  But what if another action adds something to such a tab and we
then quit the window.  Or is such a scenario impossible?

martin