Format with new black (#1679)

Black is very opinionated, but sometimes those opinions change. Run the
new black version across the codebase, and lock down the version used by
pre-commit so we don't get surprised like this again.

github/Notification.py

@@ -118,7 +118,10 @@ class Notification(github.GithubObject.CompletableGithubObject):
         """
         :calls: `PATCH /notifications/threads/:id <https://developer.github.com/v3/activity/notifications/>`_
         """
-        headers, data = self._requester.requestJsonAndCheck("PATCH", self.url,)
+        headers, data = self._requester.requestJsonAndCheck(
+            "PATCH",
+            self.url,
+        )
 
     def get_pull_request(self):
         """