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

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

Author: pre-commit-ci[bot]

sliding_window/maximum_sum_subarray.py

@@ -58,4 +58,4 @@ def longest_substring_without_repeating_characters(s: str) -> int:
 if __name__ == "__main__":
     import doctest
 
-    doctest.testmod()
+    doctest.testmod()