ci: add black as pre-commit hook

Pre-commit allows for incremental changes and pins the version of the tool that is applied. Install as folllows: python3 -m pip install pre-commit pre-commit install
sympy · Nov 6, 2021 · ea6e4eb · ea6e4eb
1 parent f0ad6ca
commit ea6e4eb
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
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+repos:
+  - repo: https://github.com/psf/black
+    rev: 21.10b0
+    hooks:
+      - id: black