Fix couple typos (#4839)

Lib/asyncio/windows_events.py

@@ -711,7 +711,7 @@ class IocpProactor:
                     f.set_result(value)
                     self._results.append(f)
 
-        # Remove unregisted futures
+        # Remove unregistered futures
         for ov in self._unregistered:
             self._cache.pop(ov.address, None)
         self._unregistered.clear()

Lib/test/test_asyncio/test_proactor_events.py

@@ -423,7 +423,7 @@ class ProactorSocketTransportTests(test_utils.TestCase):
     def test_dont_pause_writing(self):
         tr = self.pause_writing_transport(high=4)
 
-        # write a large chunk which completes immedialty,
+        # write a large chunk which completes immediately,
         # it should not pause writing
         fut = asyncio.Future(loop=self.loop)
         fut.set_result(None)