code: def print_results(cls, stdout, stderr):
          
          for line in stderr:
              print(line, file=sys.stderr)
          if stdout:
              if stderr:  # blank line to separate stdout from stderr
                  print(file=sys.stderr)
              cls._print_stdout(stdout)
          else:
              print(':) No issues found.')
docs: Print linter results and exits with an error if there's any.