Fix

Author: MaximSmolskiy

Diff for: data_structures/linked_list/doubly_linked_list_two.py

@@ -126,7 +126,7 @@ def insert_at_position(self, position: int, value: int) -> None:
                 return
             current_position += 1
             node = node.next
-        self.insert_after_node(self.tail, new_node)
+        self.set_tail(new_node)
 
     def get_node(self, item: int) -> Node:
         node = self.head
@@ -238,6 +238,7 @@ def create_linked_list() -> None:
     9
     >>> linked_list = LinkedList()
     >>> linked_list.insert_at_position(position=1, value=10)
+    >>> linked_list
     """