Fix viz bugs and bring graphblas/viz.py under test and coverage - #597

Fix viz bugs and bring graphblas/viz.py under test and coverage#597

eriknw wants to merge 5 commits into

16-asv-benchmarkspython-graphblas/python-graphblas:16-asv-benchmarksfrom

17-viz-fixespython-graphblas/python-graphblas:17-viz-fixesCopy head branch name to clipboard