Document autoflushing in packaging.test.support.LoggingCatcher.get_logs.
Document autoflushing in packaging.test.support.LoggingCatcher.get_logs.

I’m afraid my docstring is not as clear as it should be, but I can’t
find a concise way of describing what the code does.  Suggestions for
improvements welcome.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator