fixed cpplint format

mindspore/ccsrc/minddata/dataset/api/de_tensor.cc

@@ -1,3 +1,19 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 #include "minddata/dataset/include/de_tensor.h"
 #include "minddata/dataset/core/constants.h"
 #include "minddata/dataset/core/data_type.h"
@@ -179,4 +195,4 @@ void *DETensor::MutableData() const {
 }
 
 }  // namespace tensor
-}  // namespace mindspore
+}  // namespace mindspore