apply black and isort (#4287)

* apply black and isort

* move some type ignores

stdlib/3/abc.pyi

@@ -1,15 +1,18 @@
 from typing import Any, Callable, Type, TypeVar
+
 # Stubs for abc.
 
-_T = TypeVar('_T')
-_FuncT = TypeVar('_FuncT', bound=Callable[..., Any])
+_T = TypeVar("_T")
+_FuncT = TypeVar("_FuncT", bound=Callable[..., Any])
 
 # Thesee definitions have special processing in mypy
 class ABCMeta(type):
     def register(cls: ABCMeta, subclass: Type[_T]) -> Type[_T]: ...
 
 def abstractmethod(callable: _FuncT) -> _FuncT: ...
+
 class abstractproperty(property): ...
+
 # These two are deprecated and not supported by mypy
 def abstractstaticmethod(callable: _FuncT) -> _FuncT: ...
 def abstractclassmethod(callable: _FuncT) -> _FuncT: ...