Update typing_extensions imports in stdlib (#11244)

Co-authored-by: AlexWaygood <alex.waygood@gmail.com>

stdlib/email/_header_value_parser.pyi

@@ -2,8 +2,8 @@ from collections.abc import Iterable, Iterator
 from email.errors import HeaderParseError, MessageDefect
 from email.policy import Policy
 from re import Pattern
-from typing import Any
-from typing_extensions import Final, Self
+from typing import Any, Final
+from typing_extensions import Self
 
 WSP: Final[set[str]]
 CFWS_LEADER: Final[set[str]]

stdlib/email/headerregistry.pyi

@@ -13,8 +13,8 @@ from email._header_value_parser import (
 )
 from email.errors import MessageDefect
 from email.policy import Policy
-from typing import Any, ClassVar, Protocol
-from typing_extensions import Literal, Self
+from typing import Any, ClassVar, Literal, Protocol
+from typing_extensions import Self
 
 class BaseHeader(str):
     # max_count is actually more of an abstract ClassVar (not defined on the base class, but expected to be defined in subclasses)

stdlib/email/message.pyi

@@ -5,8 +5,8 @@ from email.contentmanager import ContentManager
 from email.errors import MessageDefect
 from email.header import Header
 from email.policy import Policy
-from typing import Any, Protocol, TypeVar, overload
-from typing_extensions import Literal, Self, TypeAlias
+from typing import Any, Literal, Protocol, TypeVar, overload
+from typing_extensions import Self, TypeAlias
 
 __all__ = ["Message", "EmailMessage"]