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

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

Author: pre-commit-ci[bot]

bit_manipulation/find_upper_lower_nibble.py

@@ -25,4 +25,5 @@ def get_nibbles(num: int) -> tuple[int, int]:
 
 if __name__ == "__main__":
     import doctest
+
     doctest.testmod()