[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

physics/collision_detection.py

@@ -85,7 +85,7 @@
     for event in pygame.event.get():
         if event.type == pygame.QUIT:
             running = False
-            print("Number of collisions occurred are",collision_count)
+            print("Number of collisions occurred are", collision_count)
     pygame.display.update()
 
 # Quit Pygame