Fix pep8 and coverage

github/GithubObject.py

@@ -20,7 +20,7 @@ import GithubException
 
 class _NotSetType:
     def __repr__(self):
-        return "NotSet"
+        return "NotSet"  # pragma no cover
 NotSet = _NotSetType()
 
 

github/Repository.py

@@ -889,7 +889,7 @@ class Repository(github.GithubObject.GithubObject):
             None
         )
         return [
-            github.ContentFile.ContentFile(self._requester, attributes, completed=attributes["type"]!="file")  # Lazy completion only makes sense for files. See discussion here: https://github.com/jacquev6/PyGithub/issues/140#issuecomment-13481130
+            github.ContentFile.ContentFile(self._requester, attributes, completed=(attributes["type"] != "file"))  # Lazy completion only makes sense for files. See discussion here: https://github.com/jacquev6/PyGithub/issues/140#issuecomment-13481130
             for attributes in data
         ]
 

github/tests/Issue140.py

@@ -38,4 +38,8 @@ class Issue140(Framework.TestCase):  # https://github.com/jacquev6/PyGithub/issu
     def testGetFileContents(self):
         contents = self.repo.get_file_contents("/js/bootstrap-affix.js")
         self.assertEqual(contents.encoding, "base64")
+        self.assertEqual(contents.url, "https://api.github.com/repos/twitter/bootstrap/contents/js/bootstrap-affix.js")
         self.assertEqual(len(contents.content), 4722)
+
+    def testGetDirContentsWithRef(self):
+        contents = self.repo.get_dir_contents("/js", "")