Start using new ruff linter.

.github/workflows/main.yml

@@ -102,11 +102,11 @@ jobs:
         if: ${{ contains(matrix.container, 'fedora') && matrix.build-type == 'normal' }}
       - run: rm -rf $(rpm --eval '%_dbpath')
         if: matrix.build-type == 'no-optional-deps'
-      - run: pip install coveralls
-      - run: pip install pyupgrade
+      - run: pip install coveralls pyupgrade ruff
       - uses: actions/checkout@v3
       - run: pytest
       - run: flake8
+      - run: ruff .
       - run: find . -name '*.py' | xargs pyupgrade --py38-plus
       - run: python3 -m cProfile -o profile.stats lint.py -V test/source/* test/binary/* > /dev/null
       - run: python3 test/dump_stats.py profile.stats

pyproject.toml

@@ -4,3 +4,7 @@ requires = [
     "wheel"
 ]
 build-backend = "setuptools.build_meta"
+
+[tool.ruff]
+
+ignore = ["E501"]