all python files are now formated with black (#23)

* all python files are now formated with black

NOTE:
some configurations where necessary. flake8 line-length has to be set to 88
which is the default for black. but this was not enough some lines of black
where formated longer then 88 characters. found flake8-bugbear with B950.

with that and in combination with ignore=E501 it is possible to ignore long
lines, but if there are lines to long it will still point it out.

further also for isort some configuration was necessary

REFERENCES:
https://github.com/psf/black/blob/master/docs/compatible_configs.md#isort
https://github.com/psf/black/blob/master/docs/compatible_configs.md#flake8
https://github.com/PyCQA/flake8-bugbear#opinionated-warnings

* ext removed unnecessary commented import statement

* generators add pragma: no cover to increase code coverage

NOTE:
this should be corrected with a real test in one of the next commits

* fixed the syntax.

Co-authored-by: Mojib Wali <44528277+mb-wali@users.noreply.github.com>

tests/test_invenio_config_tugraz.py

@@ -16,17 +16,18 @@ from invenio_config_tugraz import InvenioConfigTugraz
 def test_version():
     """Test version import."""
     from invenio_config_tugraz import __version__
+
     assert __version__
 
 
 def test_init():
     """Test extension initialization."""
-    app = Flask('testapp')
+    app = Flask("testapp")
     ext = InvenioConfigTugraz(app)
-    assert 'invenio-config-tugraz' in app.extensions
+    assert "invenio-config-tugraz" in app.extensions
 
-    app = Flask('testapp')
+    app = Flask("testapp")
     ext = InvenioConfigTugraz()
-    assert 'invenio-config-tugraz' not in app.extensions
+    assert "invenio-config-tugraz" not in app.extensions
     ext.init_app(app)
-    assert 'invenio-config-tugraz' in app.extensions
+    assert "invenio-config-tugraz" in app.extensions