use else in right spot

src/python/grpcio_health_checking/grpc_health/v1/health.py

@@ -118,13 +118,11 @@ class HealthServicer(_health_pb2_grpc.HealthServicer):
             status = self._server_status.get(service)
             if status is None:
                 status = _health_pb2.HealthCheckResponse.SERVICE_UNKNOWN  # pylint: disable=no-member
-            else:
             send_response_callback(
                 _health_pb2.HealthCheckResponse(status=status))
             if service not in self._send_response_callbacks:
                 self._send_response_callbacks[service] = set()
-                self._send_response_callbacks[service].add(
+            self._send_response_callbacks[service].add(send_response_callback)
-                    send_response_callback)
             context.add_callback(
                 self._on_close_callback(send_response_callback, service))
         return blocking_watcher
@@ -140,6 +138,7 @@ class HealthServicer(_health_pb2_grpc.HealthServicer):
         with self._lock:
             if self._gracefully_shutting_down:
                 return
+            else:
                 self._server_status[service] = status
                 if service in self._send_response_callbacks:
                     for send_response_callback in self._send_response_callbacks[