Revert whitespace change

Author: pushfoo

arcade/sprite/base.py

@@ -404,7 +404,6 @@ def color(self, color: RGBOrA255):
             if len(_a) > 1:
                 raise ValueError(f"iterable must unpack to 3 or 4 values not {len(color)}")
             a = _a[0]
-
         else:
             a = self._color.a