Make black

doc/conf.py

examples/plot_offline_events.py

examples/plot_offline_hits.py

examples/plot_offline_tracks.py

examples/plot_offline_usr.py

km3io/definitions.py

km3io/gseagen.py

km3io/offline.py

km3io/online.py

km3io/patches.py

km3io/rootio.py

km3io/tools.py

km3io/utils/kprinttree.py

setup.py

tests/test_gseagen.py

tests/test_offline.py

tests/test_online.py

tests/test_tools.py