Re: Adding transient to Emacs core

[martin rudalics]

>> If you say that (pop-up-windows nil) is not a valid customization, I
>> would strongly disagree with that.
>
> I have addressed this by let-binding that variable to t around the call
> to display-buffer.  There's just no way around that because transient's
> buffer just has to be displayed somewhere other than the selected
> window.

This would constitute a major bug in `display-buffer' - `pop-up-windows'
is semi-obsolete ("provided for backward compatibility only").  The
canonical way to do what you want is to provide an

(inhibit-same-window . t)

action alist entry.

martin