Class Float

Lib/test/test_str.py:1618–1620

        # issue18780
        import enum
        class Float(float, enum.Enum):
            # a mixed-in type will use the name for %s etc.
            PI = 3.1415926
        class Int(enum.IntEnum):
            # IntEnum uses the value and not the name for %s etc.
            IDES = 15