FIX : lint error

Author: sungjinwi

maximum-depth-of-binary-tree/sungjinwi.py

@@ -26,4 +26,4 @@ class Solution:
     def maxDepth(self, root: Optional[TreeNode]) -> int:
         if not root:
             return 0
-        return max(self.maxDepth(root.left), self.maxDepth(root.right)) + 1
+        return max(self.maxDepth(root.left), self.maxDepth(root.right)) + 1