gall: explain reason for strange conditional
(ap-error %watch-not-unique tang) :: reentrant, maybe bad?
$(moves t.moves)
::
+ ::NOTE 0-check guards against pre-release bug
=? p.move.move !=(0 sub-nonce.yoke)
(weld sys-wire [(scot %ud sub-nonce.yoke) sub-wire])
%_ $
