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

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

Author: pre-commit-ci[bot]

conversions/binary_to_decimal.py

@@ -41,4 +41,5 @@ def bin_to_decimal(bin_string: str) -> int:
 
 if __name__ == "__main__":
     from doctest import testmod
+
     testmod()