session: Fix docstring
session: Fix docstring

kotamat/pyspotify,mopidy/pyspotify,kotamat/pyspotify,felix1m/pyspotify,kotamat/pyspotify,jodal/pyspotify,jodal/pyspotify,felix1m/pyspotify,felix1m/pyspotify,mopidy/pyspotify,jodal/pyspotify