blacked tests

tests/flake8_project/src/flake8_project/__init__.py

tests/flake8_project/src/flake8_project/main.py

tests/isort_project/src/isort_project/z_module.py

tests/pytest_project/src/pytest_project/__init__.py

tests/pytest_project/src/pytest_project/main.py

...on_install_project/src/python_install_project/__init__.py

...python_install_project/src/python_install_project/main.py

tests/ruff_project/src/ruff_project/__init__.py

tests/ruff_project/src/ruff_project/main.py