Style was fixed.

Signed-off-by: olesya <bks-ol@mail.ru>

Author: bks-ol

rclcpp/test/rclcpp/test_create_custom_subscription.cpp

@@ -1,3 +1,17 @@
+// Copyright 2025 Open Source Robotics Foundation, Inc.
+//
+// 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 <gtest/gtest.h>
 
 #include <chrono>
@@ -39,9 +53,8 @@ class CustomSubscription : public rclcpp::Subscription<
   MessageT, AllocatorT, SubscribedT, ROSMessageT, MessageMemoryStrategyT> 
 {
 public:
-
   template <typename... Args>
-  CustomSubscription(Args &&...args) : rclcpp::Subscription<
+  explicit CustomSubscription(Args &&...args) : rclcpp::Subscription<
     MessageT, AllocatorT, SubscribedT, ROSMessageT, MessageMemoryStrategyT>(
     std::forward<Args>(args)...) {}
 };
@@ -69,4 +82,4 @@ TEST_F(TestCreateSubscription, create) {
   ASSERT_NE(nullptr, subscription);
   EXPECT_STREQ("/ns/topic_name", subscription->get_topic_name());
   static_assert(std::is_same_v<std::decay_t<decltype(*subscription.get())>, SubscriptionT>);
-}
+}