[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

@@ -50,4 +50,4 @@ def half_adder(input_a: int, input_b: int) -> tuple[int, int]:
 if __name__ == "__main__":
     import doctest
 
-    doctest.testmod()
+    doctest.testmod()