update doc

AtsushiSakai · AtsushiSakai · commit ef40b4a82b02 · 2018-10-05T21:04:21.000+09:00
diff --git a/docs/modules/arm_navigation.rst b/docs/modules/arm_navigation.rst
@@ -13,7 +13,7 @@ This is a interactive simulation.
 You can set the goal position of the end effector with left-click on the
 ploting area.
 
-`Documentation <PythonRobotics/arm_obstacle_navigation.py at master · AtsushiSakai/PythonRobotics https://github.com/AtsushiSakai/PythonRobotics/blob/master/ArmNavigation/arm_obstacle_navigation/arm_obstacle_navigation.py>`_
+Check this doc for machematical background: `Jupyter notebook documentation <https://github.com/AtsushiSakai/PythonRobotics/blob/master/ArmNavigation/arm_obstacle_navigation/arm_obstacle_navigation.py>`_
 
 |3|
 
