bug#60886: 29.0.60; split-root-window-below broken for split-window-keep-point

[martin rudalics]

> I guess I don't understand the use case then? how can that happen?

With emacs -Q do

M-: (pop-to-buffer "*Messages*")
C-x w 3

> And what would you suggest to say in the doc string instead?

Either nothing or what 'split-window' says in that case: That the new
window shows the buffer of the window selected on the frame containing
the window that was split.

Functions like 'split-window-below' were historically intended for
interactive use only.  The Elisp manual said about them

   For interactive use, Emacs provides two commands which always split
   the selected window.

which apparently is no longer true.

martin