test_body_encoding(): a new test for Charset.body_encode(), especially one that tests the obscure bug reported in SF # 625509.
test_body_encoding(): a new test for Charset.body_encode(), especially
one that tests the obscure bug reported in SF # 625509.

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