old_contents: # Skeleton file for the Python "linked-list" exercise.
  
  
  class Node(object):
      def __init__(self, value, next=None, prev=None):
          self.value = value
          self.next = next
          self.prev = prev
  
  
  class LinkedList(object):
      def __init__(self):
          pass  # Complete the Deque class ...
  
new_contents: # Skeleton file for the Python "linked-list" exercise.
  # Implement the LinkedList class
  
  
  class Node(object):
      def __init__(self, value, next=None, prev=None):
          self.value = value
          self.next = next
          self.prev = prev
  
  
  class LinkedList(object):
      def __init__(self):
          pass
  
subject: Remove reference to deque