add comment for stopping the simulation

AerialNavigation/drone_3d_trajectory_following/Quadrotor.py

@@ -23,6 +23,7 @@ class Quadrotor():
         if self.show_animation:
             plt.ion()
             fig = plt.figure()
+            # for stopping simulation with the esc key.
             fig.canvas.mpl_connect('key_release_event',
                     lambda event: [exit(0) if event.key == 'escape' else None])
 

AerialNavigation/rocket_powered_landing/rocket_powered_landing.py

@@ -567,6 +567,7 @@ def plot_animation(X, U):  # pragma: no cover
 
     fig = plt.figure()
     ax = fig.gca(projection='3d')
+    # for stopping simulation with the esc key.
     fig.canvas.mpl_connect('key_release_event',
             lambda event: [exit(0) if event.key == 'escape' else None])