Add minimally more decorator annotations

Author: TuringTux

stubs/weasyprint/weasyprint/css/tokens.pyi

@@ -2,9 +2,10 @@ import abc
 from _typeshed import Incomplete
 from abc import ABC, abstractmethod
 from collections.abc import Callable, Sequence
-from typing import Any, TypeAlias
+from typing import Any, TypeAlias, TypeVar
 
 _Token: TypeAlias = Any
+_T = TypeVar("_T")
 
 ZERO_PERCENT: Incomplete
 FIFTY_PERCENT: Incomplete
@@ -54,6 +55,6 @@ def get_target(token, base_url): ...
 def get_content_list(tokens, base_url): ...
 def get_content_list_token(token, base_url): ...
 def single_keyword(function: Callable[[Incomplete], Incomplete]) -> Callable[[Sequence[_Token]], Incomplete | None]: ...
-def single_token(function: Callable[[Incomplete], Incomplete]) -> Callable[[Incomplete], Incomplete]: ...
-def comma_separated_list(function: Callable[[Incomplete], Incomplete]) -> Callable[[Incomplete], Incomplete]: ...
+def single_token(function: Callable[[Incomplete], _T]) -> Callable[[Incomplete], _T | None]: ...
+def comma_separated_list(function: Callable[[Incomplete], _T]) -> Callable[[Incomplete], tuple[_T, ...] | None]: ...
 def tokenize(item, function=None, unit=None): ...