override networkx.MultiDiGraph.add_edges_from in LabeledDiGraph
override networkx.MultiDiGraph.add_edges_from in LabeledDiGraph

to avoid new keys being generated and so identify edges with their annotations.
necozay/tulip-control,necozay/tulip-control,tulip-control/tulip-control,tulip-control/tulip-control,necozay/tulip-control,tulip-control/tulip-control,tulip-control/tulip-control,necozay/tulip-control,necozay/tulip-control