old_contents: "Implementation of the test-runner for `unittest`-based tests."
  
  import unittest
  from itertools import chain
  
  from .test_runner import TestRunner
  
  
  class UnittestRunner(TestRunner):
      """A TestRunner using `unittest`'s discovery mechanisms.
  
      This treats the `test_args` as a directory name. This discovers
      all tests under that directory and executes them.
  
      All elements in `test_args` after the first are ignored.
  
      """
  
      def __init__(self, test_args):  # pylint: disable=useless-super-delegation
          super().__init__(test_args)
  
      def _run(self):
          suite = unittest.TestLoader().discover(self.test_args)
          result = unittest.TestResult()
          result.failfast = True
          suite.run(result)
  
          return (
              result.wasSuccessful(),
              [r[1] for r in chain(result.errors, result.failures)])
  
new_contents: "Implementation of the test-runner for `unittest`-based tests."
  
  import unittest
  from itertools import chain
  
  from .test_runner import TestRunner
  
  
  class UnittestRunner(TestRunner):
      """A TestRunner using `unittest`'s discovery mechanisms.
  
      This treats the `test_args` as a directory name. This discovers
      all tests under that directory and executes them.
  
      All elements in `test_args` after the first are ignored.
  
      """
  
      def _run(self):
          suite = unittest.TestLoader().discover(self.test_args)
          result = unittest.TestResult()
          result.failfast = True
          suite.run(result)
  
          return (
              result.wasSuccessful(),
              [r[1] for r in chain(result.errors, result.failures)])
  
subject: remove useless-super-delegation