2dnav_erratic page is empty: navigation/Tutorials/RobotSetup - ROS Wiki states “Note: This tutorial assumes familiarity with ROS and how to use it. Please see ROS Documentation. Also, the 2dnav_erratic package provides a simple example of a package created by following this tutorial for the Videre Erratic platform.” , but 2dnav_erratic - ROS Wiki has no content. And there is no 2dnav_erratic in github: Repository search results · GitHub