fixed typo in docstring
fixed typo in docstring


Former-commit-id: 70a4572e0f86307d8910666ef9202854e2099e53
Former-commit-id: c3ef6b1468d80c850acda8a9ba316d3d72fce52e
Former-commit-id: b56b1b1ea8e45f9b172801071c5104f83a7377e4
treverhines/PyGeoNS