I've been using this for a while; it is occasionally handy. #terrain
is a new wizard mode command which brings up a text display where the map
topology is revealed, similar to the obscure #wmode command but showing
different information. Also, #wmode has been tweaked a little so as to
actually overlay the tty-mode map exactly, rather than being off by one
line and one column. (That shouldn't really matter for other windowing
schemes where the map and a text rendition of it aren't very likely to
have a given location be displayed at the exact same screen position.)
The line of formatted flags info below the terrain display probably
belongs in a separate debugging command altogether where it wouldn't have
to be displayed in such a terse fashion.
projects / nethack / commit