Replace isort/flake8 with ruff

.github/workflows/lint.yml

@@ -3,8 +3,8 @@ name: Lint
 on: [push]
 
 jobs:
-  flake8:
-    name: flake8
+  ruff:
+    name: ruff
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
@@ -13,26 +13,10 @@ jobs:
         uses: actions/setup-python@v2
         with:
           python-version: 3.9
-      - name: Install flake8
-        run: pip install --upgrade flake8
-      - name: Run flake8
+      - name: Install ruff
+        run: pip install --upgrade ruff
+      - name: Run ruff
         uses: liskin/gh-problem-matcher-wrap@v1
         with:
-          linters: flake8
-          run: flake8
-
-  isort:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v2
-      - name: Set up Python
-        uses: actions/setup-python@v2
-        with:
-          python-version: 3.9
-      - run: python -m pip install isort
-      - name: isort
-        uses: liskin/gh-problem-matcher-wrap@v1
-        with:
-          linters: isort
-          run: isort --check --diff djangocms_admin_style
+          linters: ruff
+          run: ruff

djangocms_admin_style/templatetags/admin_style_tags.py

@@ -5,7 +5,6 @@
 from django.template.loader import render_to_string
 from django.utils.translation import gettext
 
-
 # We follow the Semantic versioning convention
 # minor - Refers to the minor release track (3.x.1)
 # patch - Refers to the patch release track (3.4.x)