code: def post_commit_status(self):
          
          if self.violations:
              plural = '' if self.introduced_issues_count == 1 else 's'
              description = 'Pull Request introduced {} linting violation{}'.format(
                  self.introduced_issues_count, plural)
              self._post_status('failure', description)
          else:
              self._post_status('success', 'Linting detected no new issues.')
docs: Posts results to a commit status in GitHub if this build is for a pull request.