Issue #19572: Replace a return that shouldn't have been removed from test_os. This should fix the test_os failure on the AMD64 Windows 7 buildbot.
Issue #19572: Replace a return that shouldn't have been removed from test_os.
This should fix the test_os failure on the AMD64 Windows 7 buildbot.

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