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>

invenio_config_tugraz/ext.py

@@ -8,8 +8,6 @@
 
 """invenio module that adds tugraz configs."""
 
-from flask_babelex import gettext as _
-
 from . import config
 
 
@@ -24,10 +22,10 @@ class InvenioConfigTugraz(object):
     def init_app(self, app):
         """Flask application initialization."""
         self.init_config(app)
-        app.extensions['invenio-config-tugraz'] = self
+        app.extensions["invenio-config-tugraz"] = self
 
     def init_config(self, app):
         """Initialize configuration."""
         for k in dir(config):
-            if k.startswith('INVENIO_CONFIG_TUGRAZ_'):
+            if k.startswith("INVENIO_CONFIG_TUGRAZ_"):
                 app.config.setdefault(k, getattr(config, k))