scapy-based test example code has wrong example

On (I think it was) https://ooni.torproject.org/docs/writing_tests.html there is some sample code using twisted.defer.inlineCallbacks() which calls

optParameters = [['target', 't', self.localOptions['target'], "Specify the target to ping"]]

Arturo thought part of this line was wrong -- self.localOptions should either be 127.0.0.1 or None.