def emptyline(self):
        pass
The default implementation of C{changeAllProjectVersions} is
dataset/ETHPy150Open idumpling/robotx/robotx/lib/DebugLibrary.py/DebugCmd.emptyline--crossover with--dataset/ETHPy150Open twisted/twisted/twisted/python/test/test_release.py/ScriptTests.test_defaultChangeVersionsVersionChanger