[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

data_structures/binary_tree/binary_tree_maximum_path_sum.py

@@ -126,4 +126,3 @@ def construct_tree() -> TreeNode:
     print("Given example output: ", max_sum)
 
     doctest.testmod()
-