Use PEP 585 syntax wherever possible (#6717)

stdlib/http/cookiejar.pyi

@@ -1,7 +1,7 @@
 import sys
 from _typeshed import StrPath
 from http.client import HTTPResponse
-from typing import ClassVar, Iterable, Iterator, Pattern, Sequence, Tuple, TypeVar, overload
+from typing import ClassVar, Iterable, Iterator, Pattern, Sequence, TypeVar, overload
 from urllib.request import Request
 
 _T = TypeVar("_T")
@@ -102,10 +102,10 @@ class DefaultCookiePolicy(CookiePolicy):
             strict_ns_set_initial_dollar: bool = ...,
             strict_ns_set_path: bool = ...,
         ) -> None: ...
-    def blocked_domains(self) -> Tuple[str, ...]: ...
+    def blocked_domains(self) -> tuple[str, ...]: ...
     def set_blocked_domains(self, blocked_domains: Sequence[str]) -> None: ...
     def is_blocked(self, domain: str) -> bool: ...
-    def allowed_domains(self) -> Tuple[str, ...] | None: ...
+    def allowed_domains(self) -> tuple[str, ...] | None: ...
     def set_allowed_domains(self, allowed_domains: Sequence[str] | None) -> None: ...
     def is_not_allowed(self, domain: str) -> bool: ...
     def set_ok_version(self, cookie: Cookie, request: Request) -> bool: ...  # undocumented

stdlib/http/cookies.pyi

@@ -1,5 +1,5 @@
 import sys
-from typing import Any, Dict, Generic, Iterable, Mapping, TypeVar, Union, overload
+from typing import Any, Generic, Iterable, Mapping, TypeVar, Union, overload
 
 if sys.version_info >= (3, 9):
     from types import GenericAlias
@@ -18,7 +18,7 @@ def _unquote(str: str) -> str: ...
 
 class CookieError(Exception): ...
 
-class Morsel(Dict[str, Any], Generic[_T]):
+class Morsel(dict[str, Any], Generic[_T]):
     value: str
     coded_value: _T
     key: str
@@ -40,7 +40,7 @@ class Morsel(Dict[str, Any], Generic[_T]):
     if sys.version_info >= (3, 9):
         def __class_getitem__(cls, item: Any) -> GenericAlias: ...
 
-class BaseCookie(Dict[str, Morsel[_T]], Generic[_T]):
+class BaseCookie(dict[str, Morsel[_T]], Generic[_T]):
     def __init__(self, input: _DataType | None = ...) -> None: ...
     def value_decode(self, val: str) -> _T: ...
     def value_encode(self, val: _T) -> str: ...