code format

Signed-off-by: Ericsii <ericfengx@foxmail.com>

Author: Ericsii

nav2_route/include/nav2_route/node_spatial_tree.hpp

@@ -57,7 +57,7 @@ struct GraphAdaptor
 typedef nanoflann::KDTreeSingleIndexAdaptor<
     nanoflann::L2_Simple_Adaptor<double, GraphAdaptor>, GraphAdaptor, DIMENSION,
     unsigned int>
-    kd_tree_t;
+  kd_tree_t;
 
 /**
  * @class nav2_route::NodeSpatialTree