Re: want user option for pop-to-buffer to split window horizontally not vertically

["Richard M. Stallman"]

    window.c:3583:      window = Fsplit_window (window, Qnil, Qnil);
    window.c:3597:          window = Fsplit_window (window, Qnil, Qnil);

    My patch replaces nil in these two places with the value of a new
    user option which is nil by default.

With that option, a user could elect either "always vertical"
or "always horizontal".  Is that really enough improvement?

I would rather add a hook that's more general, but after the release.
For now, someone could use display-buffer-hook and rewrite this
function in Lisp.