Add black badge

marinegor · Sep 24, 2020 · f11e597 · f11e597
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diff --git a/README.md b/README.md
@@ -76,4 +76,6 @@ If you don't know SSX/SFX data processing but really want to learn it, here is w
   - and finally please read `man indexamajig` after you install CrystFEL.
 
 ## Development <a name="Development"></a>
+[![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
+
 If you want to contribute to the repo, please use pre-commit hooks described in `.pre-commit-config.yaml`. It was generated by `pre-commit` [utility](https://pre-commit.com/), so refer to it's documentation when working with it. All requirements necessary for development are described in `requirements-dev.txt`.