fix code style

paddle/fluid/operators/send_recv_op_test.cc

@@ -156,6 +156,7 @@ TEST(SendRecvOp, CPUDense) {
   std::thread server_thread(StartServerNet, false, &initialized);
   while (!initialized) {
   }
+
   static_cast<paddle::operators::ListenAndServOp *>(listen_and_serv_op.get())
       ->WaitServerReady();
 
@@ -175,9 +176,10 @@ TEST(SendRecvOp, CPUDense) {
   std::string endpoint = paddle::string::Sprintf("127.0.0.1:%d", selected_port);
   attrs.insert({"endpoints", std::vector<std::string>({endpoint})});
   attrs.insert({"epmap", std::vector<std::string>({endpoint})});
-  auto send_op = f::OpRegistry::CreateOp(
-      "send", {{"X", {"x1"}}},
-      {{"Out", {"Out"}}, attrs);
+  const f::VariableNameMap &inputs = {{"X", {"x1"}}};
+  const f::VariableNameMap &outputs = {{"Out", {"Out"}}};
+
+  auto send_op = f::OpRegistry::CreateOp("send", inputs, outputs, attrs);
   send_op->Run(scope, place);
 
   auto in_var = scope.Var("x1");
@@ -217,8 +219,7 @@ TEST(SendRecvOp, CPUSparse) {
   scope.Var("RPC_CLIENT_VAR");
   f::AttributeMap attrs;
   selected_port = listen_and_serv_op_ptr->GetSelectedPort();
-    std::string endpoint =
-        paddle::string::Sprintf("127.0.0.1:%d", selected_port);
+  std::string endpoint = paddle::string::Sprintf("127.0.0.1:%d", selected_port);
   attrs.insert({"endpoints", std::vector<std::string>({endpoint})});
   attrs.insert({"epmap", std::vector<std::string>({endpoint})});
   auto send_op = f::OpRegistry::CreateOp("send", {{"X", {"x1"}}},