Add YAML format checking

Author: stefanv

.pre-commit-config.yaml

@@ -2,10 +2,16 @@
 # pre-commit install
 
 repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.1.0
+    hooks:
+      - id: check-yaml
+      - id: end-of-file-fixer
+      - id: trailing-whitespace
   - repo: https://github.com/psf/black
     rev: 22.1.0
     hooks:
-    - id: black
+      - id: black
   - repo: https://gitlab.com/pycqa/flake8
     rev: 3.8.4
     hooks: