Docstring for enum is not inferred as string.

[qria]

Docstring for enum.Enum is inferred as the enum class itself, instead of str.

import enum

class A(enum.Enum):
    """Docstring"""

reveal_type(A.__doc__)   # <string>:7: error: Revealed type is '__main__.A'

Tested with mypy 6.2.0, python 3.6.1

[97littleleaf11]

Currently the revealed type is Union[builtins.str, None]

[emmatyping]

object defines __doc__ as str | None, so this is working as expected now.