Define local pre-commit checks

Author: harminius

.pre-commit-config.yaml

@@ -0,0 +1,7 @@
+# Black version is kept in sync with .github/workflows/code_style.yml
+repos:
+  - repo: https://github.com/psf/black-pre-commit-mirror
+    rev: 26.1.0
+    hooks:
+      - id: black
+        args: ["--line-length=120"]