Add a small test to verify that member and getset descriptors now have docstrings (using file.closed and file.name as examples).
Add a small test to verify that member and getset descriptors now have
docstrings (using file.closed and file.name as examples).

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