Code review comment for lp:~gz/bzr/unexpected_successes_are_bad_654474

Docstring pedantry:

8 + def addUnexpectedSuccess(self, test, details=None):
9 + """Tell result the test unexpectedly passed, counting as a failure

That sentence should end in a period.

I've chatted IRL about the test_smart_add changes, I think I may have a nicer alternative that; I'll put up a branch in a moment.