'Show that a user can retrieve the contents of a PR file.'

def test_contents(self):

    cassette_name = self.cassette_name('contents')
    with self.recorder.use_cassette(cassette_name):
        pull_file = self.get_pull_request_file(owner='sigmavirus24', repo='github3.py', pull_number=286, filename='github3/pulls.py')
        contents = pull_file.contents()
        assert isinstance(contents, repos.contents.Contents)
        assert (contents.decoded != '')
