[stdlib] Mark constants as Final (#14577)

stdlib/sre_parse.pyi

@@ -3,24 +3,24 @@ from collections.abc import Iterable
 from re import Match, Pattern as _Pattern
 from sre_constants import *
 from sre_constants import _NamedIntConstant as _NIC, error as _Error
-from typing import Any, overload
+from typing import Any, Final, overload
 from typing_extensions import TypeAlias
 
-SPECIAL_CHARS: str
-REPEAT_CHARS: str
-DIGITS: frozenset[str]
-OCTDIGITS: frozenset[str]
-HEXDIGITS: frozenset[str]
-ASCIILETTERS: frozenset[str]
-WHITESPACE: frozenset[str]
-ESCAPES: dict[str, tuple[_NIC, int]]
-CATEGORIES: dict[str, tuple[_NIC, _NIC] | tuple[_NIC, list[tuple[_NIC, _NIC]]]]
-FLAGS: dict[str, int]
-TYPE_FLAGS: int
-GLOBAL_FLAGS: int
+SPECIAL_CHARS: Final = ".\\[{()*+?^$|"
+REPEAT_CHARS: Final = "*+?{"
+DIGITS: Final[frozenset[str]]
+OCTDIGITS: Final[frozenset[str]]
+HEXDIGITS: Final[frozenset[str]]
+ASCIILETTERS: Final[frozenset[str]]
+WHITESPACE: Final[frozenset[str]]
+ESCAPES: Final[dict[str, tuple[_NIC, int]]]
+CATEGORIES: Final[dict[str, tuple[_NIC, _NIC] | tuple[_NIC, list[tuple[_NIC, _NIC]]]]]
+FLAGS: Final[dict[str, int]]
+TYPE_FLAGS: Final[int]
+GLOBAL_FLAGS: Final[int]
 
 if sys.version_info >= (3, 11):
-    MAXWIDTH: int
+    MAXWIDTH: Final[int]
 
 if sys.version_info < (3, 11):
     class Verbose(Exception): ...