Merge pull request #791 from sideshowbarker/patch-1

Add validator/validator

Author: talsafran

collections/clean-code-linters/index.md

@@ -7,6 +7,7 @@ items:
  - csscomb/csscomb.js
  - sds/scss-lint
  - htmlhint/HTMLHint
+ - validator/validator
  - CSSLint/csslint
  - PyCQA/pycodestyle
  - PyCQA/flake8