Delete test_coercion.py.  Coercion is dead, so this test is useless. (Plus, it fails. :-)
Delete test_coercion.py.  Coercion is dead, so this test is useless.
(Plus, it fails. :-)

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