Added note saying to use test_support.TESTFN for a temporary filename, and be clear that you need to clean it up when done.
Added note saying to use test_support.TESTFN for a temporary filename,
and be clear that you need to clean it up when done.

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