🚨(backend) fix linting issues after upgrading

The last upgrades introduced some linting issues.
This commit fixes them.

src/backend/core/tests/templates/test_api_templates_create.py

@@ -1,6 +1,7 @@
 """
 Tests for Templates API endpoint in impress's core app: create
 """
+
 import pytest
 from rest_framework.test import APIClient
 

src/backend/core/tests/templates/test_api_templates_delete.py

@@ -1,6 +1,7 @@
 """
 Tests for Templates API endpoint in impress's core app: delete
 """
+
 import random
 
 import pytest

src/backend/core/tests/templates/test_api_templates_generate_document.py

@@ -1,6 +1,7 @@
 """
 Test users API endpoints in the impress core app.
 """
+
 import pytest
 from rest_framework.test import APIClient
 
@@ -97,7 +98,7 @@ def test_api_templates_generate_document_related(via, mock_user_get_teams):
 
     client = APIClient()
     client.force_login(user)
-
+    access = None
     if via == USER:
         access = factories.UserTemplateAccessFactory(user=user)
     elif via == TEAM:

src/backend/core/tests/templates/test_api_templates_list.py

@@ -1,6 +1,7 @@
 """
 Tests for Templates API endpoint in impress's core app: list
 """
+
 from unittest import mock
 
 import pytest

src/backend/core/tests/templates/test_api_templates_retrieve.py

@@ -1,6 +1,7 @@
 """
 Tests for Templates API endpoint in impress's core app: retrieve
 """
+
 import pytest
 from rest_framework.test import APIClient
 

src/backend/core/tests/templates/test_api_templates_update.py

@@ -1,6 +1,7 @@
 """
 Tests for Templates API endpoint in impress's core app: update
 """
+
 import random
 
 import pytest