bug#7368: Testcase

[Stefan Monnier]

> In principle, in this very awkward situation display-buffer has 3 options:

> 1) To display buffer in selected window -- but not-in-this-window=t.

> 2) To display buffer in a new frame -- but pop-up-frames says we
> *never* make a separate frame.

> 3) To display buffer in place of completions window -- but that window
> is "dedicated".

It's actually soft-dedicated (i.e. dedicated but switch-to-buffer can
override it).

> To me option 3 seems the least unexpected.

Agreed.  Another option is to create a third window.


        Stefan