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

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

Author: pre-commit-ci[bot]

strings/check_pangram.py

@@ -13,4 +13,5 @@ def check_pangram(input_str: str) -> bool:
 
 if __name__ == "__main__":
     import doctest
+
     doctest.testmod()