code: def regression():
      
      lint()
      doctests()
      storybook = _storybook({}).only_uninherited()
      storybook.with_params(**{"python version": "2.7.14"}).filter(
          lambda story: not story.info.get("fails_on_python_2")
      ).ordered_by_name().play()
      storybook.with_params(**{"python version": "3.7.0"}).ordered_by_name().play()
docs: Run regression testing - lint and then run all tests.