Add "code style: black" badge to README.md

README.md

@@ -1,4 +1,9 @@
-SCUBA  [![Build Status](https://github.com/JonathonReinhart/scuba/actions/workflows/build-test.yml/badge.svg)](https://github.com/JonathonReinhart/scuba/actions/workflows/build-test.yml) [![codecov.io](https://codecov.io/github/JonathonReinhart/scuba/coverage.svg?branch=main)](https://codecov.io/github/JonathonReinhart/scuba?branch=main) [![PyPI](https://img.shields.io/pypi/v/scuba.svg)](https://pypi.python.org/pypi/scuba) [![Docs](https://readthedocs.org/projects/scuba/badge/?version=latest)](https://scuba.readthedocs.io/)
+SCUBA
+[![Build Status](https://github.com/JonathonReinhart/scuba/actions/workflows/build-test.yml/badge.svg)](https://github.com/JonathonReinhart/scuba/actions/workflows/build-test.yml)
+[![codecov.io](https://codecov.io/github/JonathonReinhart/scuba/coverage.svg?branch=main)](https://codecov.io/github/JonathonReinhart/scuba?branch=main)
+[![PyPI](https://img.shields.io/pypi/v/scuba.svg)](https://pypi.python.org/pypi/scuba)
+[![Docs](https://readthedocs.org/projects/scuba/badge/?version=latest)](https://scuba.readthedocs.io/)
+[![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
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 ![SCUBA](docs/images/SCUBA.png)