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

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

Author: pre-commit-ci[bot]

Diff for: bit_manipulation/find_unique_number.py

@@ -33,4 +33,5 @@ def find_unique_number(arr: list[int]) -> int:
 
 if __name__ == "__main__":
     import doctest
+
     doctest.testmod()