all python files are now formated with black (#106)

* 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

* removed commented import statments

Co-authored-by: Christoph Ladurner <christoph.ladurner@tugraz.at>

invenio_theme_tugraz/search.py

@@ -21,10 +21,5 @@ class FrontpageRecordsSearch(RecordsSearch):
     class Meta:
         """Default index and filter for frontpage search."""
 
-        index = 'records'
-        default_filter = Q(
-            'query_string',
-            query=(
-                   'access_right:open '
-                   )
-        )
+        index = "records"
+        default_filter = Q("query_string", query=("access_right:open "))