Help with superstates and duplicated DOT graph nodes

[bigredhdl]

I'm having a similar issue to #296 . I'd like the superstate to cover an error trigger for all substates, but this causes the DOT output to show 2 nodes of the superstate. Sorry if this has been covered elsewhere, but I would welcome advice to handle this better. The DOT output is a large part of the appeal of stateless for me, but if the graph just adds confusion it isn't as useful.