asyncio: Clean up formatting.

Lib/asyncio/futures.py

@@ -302,9 +302,7 @@ class Future:
         self._schedule_callbacks()
         if _PY34:
             self._traceback = traceback.format_exception(
-                                              exception.__class__,
-                                              exception,
-                                              exception.__traceback__)
+                exception.__class__, exception, exception.__traceback__)
         else:
             self._tb_logger = _TracebackLogger(exception)
             # Arrange for the logger to be activated after all callbacks

Lib/test/test_asyncio/test_tasks.py

@@ -1115,6 +1115,7 @@ class TaskTests(unittest.TestCase):
 
     def test_current_task(self):
         self.assertIsNone(tasks.Task.current_task(loop=self.loop))
+
         @tasks.coroutine
         def coro(loop):
             self.assertTrue(tasks.Task.current_task(loop=loop) is task)
@@ -1146,7 +1147,8 @@ class TaskTests(unittest.TestCase):
         task1 = tasks.Task(coro1(self.loop), loop=self.loop)
         task2 = tasks.Task(coro2(self.loop), loop=self.loop)
 
-        self.loop.run_until_complete(tasks.wait((task1, task2), loop=self.loop))
+        self.loop.run_until_complete(tasks.wait((task1, task2),
+                                                loop=self.loop))
         self.assertIsNone(tasks.Task.current_task(loop=self.loop))
 
     # Some thorough tests for cancellation propagation through