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/version.py

@@ -12,4 +12,4 @@ This file is imported by ``invenio_config_tugraz.__init__``,
 and parsed by ``setup.py``.
 """
 
-__version__ = '0.2.1'
+__version__ = "0.2.1"