apply black and isort (#4287)

* apply black and isort

* move some type ignores

stdlib/2and3/ftplib.pyi

@@ -1,4 +1,7 @@
 import sys
+from socket import socket
+from ssl import SSLContext
+from types import TracebackType
 from typing import (
     Any,
     BinaryIO,
@@ -16,9 +19,7 @@ from typing import (
     TypeVar,
     Union,
 )
-from types import TracebackType
-from socket import socket
-from ssl import SSLContext
+
 from _typeshed import SupportsRead, SupportsReadline
 
 _T = TypeVar("_T")