message: Update find-all-the-lonely-nodes.py
diff: @@ -25,8 +25,8 @@ class Solution(object):
  result.append(node.left.val)
  elif node.right and not node.left:
  result.append(node.right.val)
  - stk.append((node.right))
  - stk.append((node.left))
  + stk.append(node.right)
  + stk.append(node.left)
  return result
  