`_CallableGenericAlias` class and `typing.Callable` docstring should be corrected

Documentation

*Notes:

• Python 3.14.3
• Related: #145577

_CallableGenericAlias class should be corrected for example:

Represent `Callable[argtypes, resulttype]`. -> Represent `Callable[paramtypes, returntype]`.

t_args, t_result = args -> t_params, t_return = args

typing.Callable docstring should be corrected for example:

a function that takes a single parameter -> a function that has a single parameter

... to indicate optional or keyword arguments; -> ... to indicate optional or keyword parameters;

Linked PRs

• gh-145598

首先在 CPython 的 typing 实现中搜索 _CallableGenericAlias 和 typing.Callable 的 docstring。根据 issue 中的示例检查措辞，然后确认两处描述都使用了所要求的参数和返回值术语；注意，该 issue 引用了相关联的 PR gh-145598。