minor tweak in the boids

Author: parmentelat

notebooks/tps/boids/.teacher/boids.py

@@ -444,6 +444,8 @@ def main():
 * 0 remove all obstacles
 * 1 reinstate obstacles
 
+this version no longer has support for controlling the (first) boid
+
 use the following mouse events
 * right-click to add obstacle
 * shift-right-click to remove obstacle