Fix PR review creation. (#1184)

Do not modify the attributes of a PR when creating a review.

github/PullRequest.py

@@ -449,7 +449,6 @@ class PullRequest(github.GithubObject.CompletableGithubObject):
             self.url + "/reviews",
             input=post_parameters
         )
-        self._useAttributes(data)
         return github.PullRequestReview.PullRequestReview(self._requester, headers, data, completed=True)
 
     def create_review_request(self, reviewers=github.GithubObject.NotSet, team_reviewers=github.GithubObject.NotSet):

tests/PullRequestReview.py

@@ -50,6 +50,9 @@ class PullRequestReview(Framework.TestCase):
         # Test ability to get a single review
         self.pullreview = self.pull.get_review(28482091)
 
+    def testDoesNotModifyPullRequest(self):
+        self.assertEqual(self.pull.id, 111649703)
+
     def testDismiss(self):
         self.pullreview.dismiss("with prejudice")
         pr = self.pull.get_review(28482091)