Use ruff formatter

.github/workflows/lint.yml

@@ -0,0 +1,35 @@
+name: Lint
+
+on:
+  push:
+    branches: [main]
+    paths-ignore:
+      - 'docs/**'
+  pull_request:
+    branches: [main]
+    paths-ignore:
+      - 'docs/**'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+          cache: 'pip'
+
+      - name: Install dependencies
+        run: |
+          pip install --upgrade wheel pip setuptools
+          pip install .
+
+      - name: Lint with ruff
+        run: |
+          pip install ruff
+          ruff check python/ tests/
+          ruff format --check python/ tests/

.github/workflows/test.yml

@@ -33,16 +33,6 @@ jobs:
           pip install --upgrade wheel pip setuptools
           pip install .
 
-      - name: Lint with ruff
-        run: |
-          pip install ruff
-          ruff check python/ tests/
-
-      - name: Lint with black
-        run: |
-          pip install black
-          black --check python/lvmecp tests/
-
       - name: Test with pytest
         run: |
           pip install pytest pytest-mock pytest-asyncio pytest-cov coverage