[pre-commit] Add initial configuration

.pre-commit-config.yaml

@@ -0,0 +1,16 b''
+# See https://pre-commit.com for more information
+# See https://pre-commit.com/hooks.html for more hooks
+repos:
+-   repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v3.2.0
+    hooks:
+    -   id: trailing-whitespace
+    -   id: end-of-file-fixer
+    -   id: check-yaml
+    -   id: check-added-large-files
+
+-   repo: https://github.com/akaihola/darker
+    rev: 1.3.1
+    hooks:
+    -   id: darker
+

MANIFEST.in

@@ -8,6 +8,7 b' include pytest.ini'
 include mypy.ini
 include .mailmap
 include .flake8
+include .pre-commit-config.yaml
 
 recursive-exclude tools *
 exclude tools