Update trajopt_example.cpp

Author: mosfet80

doc/examples/trajopt_planner/src/trajopt_example.cpp

@@ -20,13 +20,13 @@
 
 // TODO(mosfet80): remove else after EOL galactic
 #if __has_include(<tf2/utils.hpp>)
-   #include <tf2/utils.hpp>
-   #include <tf2_eigen/tf2_eigen.hpp>
-   #include <tf2_ros/transform_listener.hpp>
+#include <tf2/utils.hpp>
+#include <tf2_eigen/tf2_eigen.hpp>
+#include <tf2_ros/transform_listener.hpp>
 #else
-   #include <tf2/utils.h>
-   #include <tf2_eigen/tf2_eigen.h>
-   #include <tf2_ros/transform_listener.h>
+#include <tf2/utils.h>
+#include <tf2_eigen/tf2_eigen.h>
+#include <tf2_ros/transform_listener.h>
 #endif