Moved test script

PythonAPI/util/check_collisions_substepping.py

@@ -9,7 +9,7 @@
 """
 Test collisions example for CARLA
 This script runs several scenarios involving collisions and check if they
-are deterministic.
+are deterministic for different simulation parameters.
 """
 
 import glob
@@ -87,6 +87,7 @@ class Scenario():
 
         self.clear_scene()
 
+
 class SpawnCars01(Scenario):
     def init_scene(self):
         world = self.world