diff --git a/data_structures/binary_tree/basic_binary_tree.py b/data_structures/binary_tree/basic_binary_tree.py
index 0a083d2be..2f0b1bf75 100644
--- a/data_structures/binary_tree/basic_binary_tree.py
+++ b/data_structures/binary_tree/basic_binary_tree.py
@@ -12,8 +12,7 @@ class Node:
         self.right: Node | None = None
 
 
-
-def display_tree(root: Node | None, level : int = 0) -> None:
+def display_tree(root: Node | None, level: int = 0) -> None:
     """
     >>> root = Node(1)
     >>> root.left = Node(2)