use black with default line length

ldf_adapter/__init__.py

ldf_adapter/approval/__init__.py

ldf_adapter/approval/db/sqlite.py

ldf_adapter/backend/__init__.py

ldf_adapter/cmdline_params.py

ldf_adapter/eduperson.py

ldf_adapter/logsetup.py

ldf_adapter/notifier/email.py

ldf_adapter/notifier/generic.py

ldf_adapter/results.py

ldf_adapter/userinfo.py

ldf_adapter/utils.py

tests/approval/db/generic.py

tests/approval/db/sqlite.py

tests/backend/ldap.py

tests/backend/local_unix.py

tests/eduperson.py

tests/user.py

tests/userinfo.py

tox.ini