Add space

test/test_attack_to.py

@@ -85,6 +85,7 @@ class TestAttackers(ChessLibTestBase):
                 actual = bool(is_in_check(b, side))
                 self.assertEqual(expected, actual, msg)
 
+
     def test_attackers_to_popcount(self):
         cases = [
             # Pawns (original correction): only c5 & e5 attack d4