🚨(backend) remove lint warning after update

With the upgrade to the new major version of black some files needs to be
reformatted so we run `make lint-back` to fix all issues.

cookiecutter/{{cookiecutter.organization}}-richie-site-factory/template/{{cookiecutter.site}}/src/backend/base/cache.py

@@ -1,9 +1,9 @@
 """
-    RedisCache with a fallback cache to prevent denial of service if Redis is down
-    Freely inspired by django-cache-fallback
+RedisCache with a fallback cache to prevent denial of service if Redis is down
+Freely inspired by django-cache-fallback
 
-    Credits:
-    - https://github.com/Kub-AT/django-cache-fallback/
+Credits:
+- https://github.com/Kub-AT/django-cache-fallback/
 """
 
 import logging

tests/apps/core/test_pages.py

@@ -93,7 +93,7 @@ def test_page_includes_frontend_context(self):
         """
         Create a page and make sure it includes the frontend context as included
         in `base.html`. All characters for use in javascript string should be escaped
-        (i.e: '"' should be escaped with \u0022 and '\' with \u005C) to prevent an issue when
+        (i.e: '"' should be escaped with \u0022 and '\' with \u005c) to prevent an issue when
         this variable contains unescaped characters for javascript (e.g: '\').
 
         ⚠️ If this test fails, before fixing it, identify if this change has had

tests/apps/search/test_cms_toolbars.py

@@ -1,5 +1,4 @@
-"""Test suite of the toolbar extension for search related it pages
-"""
+"""Test suite of the toolbar extension for search related it pages"""
 
 from django.contrib.auth.models import AnonymousUser, Permission