style: apply Black formatting to changed files

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

python/tests/conftest.py

@@ -33,6 +33,7 @@ except ImportError:
 
     class _FakeSchematic:
         """Minimal stand-in for skip.Schematic used in PinLocator cache."""
+
         def __init__(self, path: str):
             self.path = path
             self.symbol = []