[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/count_bits.py

@@ -28,4 +28,5 @@ def count_bits(n: int) -> int:
 
 if __name__ == "__main__":
     import doctest
+
     doctest.testmod()