def next_line(self):
        self.index()
        self.carriage_return()
        self.ensure_bounds()
Create a flask app to be used in the tests. Use the supplied class
dataset/ETHPy150Open jonathanslenders/pymux/pymux/screen.py/BetterScreen.next_line--crossover with--dataset/ETHPy150Open ga4gh/server/ga4gh/configtest.py/TestConfig.setUp