Update deque.py

Author: kelvins

src/python/deque.py

@@ -44,17 +44,17 @@ def __str__(self):
 
 if __name__ == "__main__":
     my_deque = Deque()
-    
+
     my_deque.add_front(1)
     my_deque.add_rear(2)
     my_deque.add_front(3)
-    
+
     print(my_deque)  # Output: [3, 1, 2]
-    
+
     print(my_deque.remove_front())  # Output: 3
     print(my_deque.remove_rear())  # Output: 2
-    
+
     print(my_deque.peek_front())  # Output: 1
     print(my_deque.peek_rear())  # Output: 1
-    
+
     print(my_deque.size())  # Output: 1