More tiny cleanups in docstrings and such.
More tiny cleanups in docstrings and such.

python-jsonschema/jsonschema,eodolphi/jsonschema,wikimedia/operations-debs-python-jsonschema,eodolphi/jsonschema,sightmachine/jsonschema,jamesmarva/jsonschema,varunarya10/jsonschema,dnephin/jsonschema,wikimedia/operations-debs-python-jsonschema,Julian/jsonschema,Julian/jsonschema,mathewmarcus/jsonschema