Radin

Results 2 issues of Radin

The package ["python-graphviz"](https://github.com/mims-harvard/SubGNN/blob/eae0848b823cade135428b0ac264b7caa31862a1/SubGNN.yml#L174) does not exist in pip inventory. I assume the correct version is "[graphviz](https://pypi.org/project/graphviz/)" instead.

Minor issue. Some IDEs are sensitive to the indent for comment syntax. Extra indent needs to be removed from here: https://github.com/mims-harvard/SubGNN/blob/eae0848b823cade135428b0ac264b7caa31862a1/SubGNN/train.py#L278