* Add optional robot radius to RRT/RRTStar path planners.
* update __init__ and check_collision to include radius
* during animation, if a robot radius is given then it is drawn
* Add test for robot radius
* Correct import error
* Correct missing robot_radius errors
* Address "expected 2 blank lines, found 1" error
* Address "line too long" errors
* Add missing argument description.
* Remove collision_check_with_xy and replace with check_collision
* Fix "missing whitespace after ','" error
* Update PathPlanning/ClosedLoopRRTStar/closed_loop_rrt_star_car.py
Co-authored-by: Atsushi Sakai <asakai.amsl+github@gmail.com>
Co-authored-by: Atsushi Sakai <asakai.amsl+github@gmail.com>
