Should `callable` narrow to `TypeIs[Callable[..., object]]` or `TypeIs[Callable]` ?

Currently, typeshed annotates

def callable(obj: object, /) -> TypeIs[Callable[..., object]]: ...

However, for the majority of type checkers this creates discrepancy between collections.abc.Callable and builtins.callable narrowing, only ty seems to consider blank Callable as if it were Callable[..., object], whereas all other type checkers treat it as Callable[..., Any].

from typing import reveal_type, TypeIs
from collections.abc import Callable

def is_callable(arg: object) -> TypeIs[Callable]:
    raise NotImplementedError

def check_callable(arg: object) -> None:
    if isinstance(arg, Callable):
        reveal_type(arg)
            
def check_callable2(arg: object) -> None:
    if callable(arg):
        reveal_type(arg)
        
def check_callable3(arg: object) -> None:
    if is_callable(arg):
        reveal_type(arg)

从 builtins.callable 注解开始，并将其与 collections.abc.Callable 进行比较。根据 issue 中列出的 type-checker 行为运行示例，然后查看评论讨论，以确定哪个注解能够提供一致的 narrowing；当所选 stub 在所有受影响的 checker 中都符合预期行为时，即表示完成。