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

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

Author: pre-commit-ci[bot]

boolean_algebra/half_adder.py

@@ -49,6 +49,5 @@ def half_adder(input_a: int, input_b: int) -> tuple[int, int]:
 
 if __name__ == "__main__":
     import doctest
-    
+
     doctest.testmod()
-