Some number_pad handling which wasn't present in the original cmdhelp
but is acted upon in cmd.c.
0 Show inventory
4 Move west
6 Move east
+- 'F' prefix; force fight
&: #-1,0
0 Continue a count
4 Start or continue a count
&. #1,2 vs 3,4 vs -1,0
&? number_pad=1,3
5 'g' movement prefix
+M-5 'G' movement prefix
&: number_pad=2,4
5 'G' movement prefix
+M-5 'g' movement prefix
+M-0 Inventory specific item types
&: #-1,0
5 Start or continue a count
M-2 Toggle two-weapon combat