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

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

Author: pre-commit-ci[bot]

strings/integer_to_roman.py

@@ -48,4 +48,5 @@ def integer_to_roman(number: int) -> str:
 
 if __name__ == "__main__":
     import doctest
+
     doctest.testmod()