Hrvoje Niksic <hniksic(a)srce.hr> writes in xemacs-beta(a)xemacs.org:
When a window is split horizontally (C-x 3) on a TTY, no separator
is
drawn. This used to work correctly in 20.4.
The divider width is explicitly set to 0. If you set it to 1 it will
be displayed. I assume this was done deliberately.