Removed the _nodes annotation.
Added _subprogram annotations.
Attempted to use active or copied nodes for all special viewer annotations in
the viewer.
1l=[(0,10),(10,20)] 2y=23 3fora,binl: 4foriina,b: 5x=i 6else:# NOTE: Need to support StopIteration! 7x=y 8else: 9a=b