Eli Zaretskii <eliz@gnu.org> writes:

>> So I agree with Stefan M that the prefix argument should be deprecated.
>> Do we have a process for that or should it just be removed?
>
> We cannot just remove it.  We should document that it's deprecated and
> use advertised-calling-convention to advertise the signature without
> it (which will also produce a warning about using the argument in some
> situations).

How about the attached patch?