def test_get_formatted_contents_subsitutes():
    """If subs is truthy, get_substituted contents should be called."""
    starting_contents = 'this is where we start'
    subbed_contents = 'substituted like a teacher'
    _helper_assert_formatted_contents(
        starting_contents,
        False,
        'some color config',
        False,
        ['truthy', 'list'],
        'this was colored',
        'this was squeezed',
        subbed_contents,
        subbed_contents
    )
If subs is truthy, get_substituted contents should be called.
test/util_test.py