fix code for coveralls

ArmNavigation/n_joint_arm_to_point_control/NLinkArm.py

@@ -49,7 +49,7 @@ class NLinkArm(object):
         if self.show_animation:
             self.plot()
 
-    def plot(self):
+    def plot(self):  # pragma: no cover
         plt.cla()
 
         for i in range(self.n_links + 1):

ArmNavigation/n_joint_arm_to_point_control/n_joint_arm_to_point_control.py

@@ -159,5 +159,5 @@ def ang_diff(theta1, theta2):
 
 
 if __name__ == '__main__':
-    main()
-    # animation()
+    # main()
+    animation()