human
Here's a good function header given the following:
I wrote the below code

    from lettuce import step
    line = currentframe().f_lineno
    @step(u'the    variable    "(\\w+)"    holds    (\\d+)')
    @step(u'the    variable    "(\\w+)"    is    equal    to    (\\d+)')
    def just_pass(step, *args):
        pass
    filename = bg_feature_name('simple')
    runner = Runner(filename, verbosity=3, no_color=True)
    runner.run()
    assert_stdout_lines('\nFeature:    Simple    and    successful                                                                #    tests/functional/bg_features/simple/simple.feature:1\n        As    the    Lettuce    maintainer                                                                            #    tests/functional/bg_features/simple/simple.feature:2\n        In    order    to    make    sure    the    output    is    pretty        #    tests/functional/bg_features/simple/simple.feature:3\n        I    want    to    automate    its    test                                                                    #    tests/functional/bg_features/simple/simple.feature:4\n\n        Background:\n                Given    the    variable    "X"    holds    2                                                #    tests/functional/test_runner.py:{line}\n\n        Scenario:    multiplication    changing    the    value    #    tests/functional/bg_features/simple/simple.feature:9\n                Given    the    variable    "X"    is    equal    to    2                        #    tests/functional/test_runner.py:{line}\n\n1    feature    (1    passed)\n1    scenario    (1    passed)\n1    step    (1    passed)\n'.format(line=(line + 2)))

What's a good function header?
assistant
#Here's a good function header.

@with_setup(prepare_stdout)
def test_output_background_with_success_colorless():