Satisfy cpplint

Signed-off-by: Michael X. Grey <grey@openrobotics.org>

Author: mxgrey

rclcpp/src/rclcpp/node_interfaces/node_base.cpp

@@ -15,6 +15,7 @@
 #include <string>
 #include <limits>
 #include <memory>
+#include <utility>
 #include <vector>
 
 #include "rclcpp/node_interfaces/node_base.hpp"
@@ -93,7 +94,7 @@ class NodeHandleWithContext
   std::shared_ptr<std::recursive_mutex> logging_mutex_;
   rcl_node_t * node_handle_;
 };
-} // anonymous namespace
+}  // anonymous namespace
 
 NodeBase::NodeBase(
   const std::string & node_name,