Re: display-buffer-alist simplifications

[Juri Linkov]

> I don't know why the condition part of defface specs doesn't use a
> plist, and always figured it was a historical accident.

Inner structures of the condition part of defface already use a plist:

    (((supports :slant italic))
     :slant italic)
    (((supports :underline t))
     :underline t)

And since nested structures are allowed in defface specs like:

     :box (:line-width 2 :color "grey40" :style released-button)

I see no problem using them in the condition part as well.

> So, should "the same conditional" mean `equal'?  Then it will no longer
> be possible to use a single display-buffer-alist to affect ALL
> `reuse-window' conditional specs passed to `display-buffer'.  I am
> personally fine with that.

This means more data duplication in specs.  But this duplication
can be removed via the inheritance mechanism.