fix black project

tests/black_project/src/black_project/__init__.py

 from black_project.main import main
 
-__all__ = ['main']
+__all__ = ["main"]

tests/black_project/src/black_project/main.py

@@ -7,5 +7,5 @@ def main() -> bool:
     return True
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     main()