Exclude file that Black can't parse (#18)

psf/black#4270

src/diff_shades/config.py

@@ -62,7 +62,12 @@ def supported_by_runtime(self) -> bool:
     Project("pyanalyze", "https://github.com/quora/pyanalyze.git"),
     Project("pyramid", "https://github.com/Pylons/pyramid.git"),
     Project("pytest", "https://github.com/pytest-dev/pytest.git"),
-    Project("scikit-lego", "https://github.com/koaning/scikit-lego.git"),
+    Project(
+        "scikit-lego",
+        "https://github.com/koaning/scikit-lego.git",
+        # Uses Python 3.12+ f-string syntax, not yet supported by Black
+        custom_arguments=["--extend-exclude", "/docs/_scripts/feature-selection.py"],
+    ),
     Project("sqlalchemy", "https://github.com/sqlalchemy/sqlalchemy.git"),
     Project("tox", "https://github.com/tox-dev/tox.git"),
     Project("typeshed", "https://github.com/python/typeshed.git"),