Revert previous checkin:
Revert previous checkin:

According to Jeremy, the comment only made sense when
the yield was disallowed.  Now it's testing that the yield
is allowed, so it's not bad and the outer finally is irrelevant.

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