apply black and isort (#4287)

* apply black and isort

* move some type ignores

stdlib/3/gzip.pyi

@@ -1,13 +1,14 @@
+import _compression
 import sys
 import zlib
 from typing import IO, Optional, TextIO, Union, overload
-import _compression
-from _typeshed import AnyPath, ReadableBuffer
+
 from typing_extensions import Literal
 
+from _typeshed import AnyPath, ReadableBuffer
+
 _OpenBinaryMode = Literal["r", "rb", "a", "ab", "w", "wb", "x", "xb"]
 _OpenTextMode = Literal["rt", "at", "wt", "xt"]
-
 @overload
 def open(
     filename: Union[AnyPath, IO[bytes]],