set distance to float value 'inf' instead of None

NREL / mappymatch

Pure-python package for map matching

http://mappymatch.readthedocs.io/

BSD 3-Clause "New" or "Revised" License

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Closed sjirwin closed 2 years ago

sjirwin commented 2 years ago

closes issue #89

set distance to float value inf instead of None. this will keep mypy happy.
also include formatting change made by black