bug#34749: 26.1; `delete-windows-on': (1) doc, (2) bug, (3) bug, (4) candidates

[martin rudalics]

> I think we should simply try letting the user provide all possible
> values of the FRAME argument in interactive invocations, by using
> different forms of 'C-u'.

I have no idea how to do that.  And when trying to read the
documentation on 'interactive' I nowhere detected where the "\nP"
convention is described (which apparently turns a function's last (?)
argument into the prefix argument).  Can someone enlighten me?

> That'd be too radical, IMO.  I'd rather we described the exceptional
> cases, because I think they would be rare.  Can you enumerate those
> exceptions?

The doc-string should hopefully tell these details now.

> I think it would be better to rework the interpretation of the prefix
> arg so it makes sense.

The fact that 'delete-windows-on' is the only function (together with
its 'quit-window-on' clone) with the inverted meaning of the
FRAME/ALL-FRAMES argument makes me doubt that such an interpretation
would make sense.  But since I don't know how to specify prefix args
in the first place I'm probably not really entitled to such a comment.

martin