Enforced black formatting during CI.

.github/workflows/ci.yml

@@ -49,6 +49,6 @@ jobs:
     - name: Licensing
       run: |
         # Check that the license snippet is in each python source
-        find src/ -type f -name "*.py" -exec grep -H -c 'Copyright © 2023, UChicago Argonne, LLC' {} \; | grep 0$ | cut -d':' -f1
+	find src/ -type f -name "*.py" -exec grep -H -c 'Copyright © 2023, UChicago Argonne, LLC' {} \; | grep 0$ | cut -d':' -f1
     - name: Test with pytest in Xvfb
       run: xvfb-run python -m pytest -vv --timeout=120