Tassilo Horn <tsdh@gnu.org> writes:

> According to the last sentence, I'd assume that
>
>   (setq my-alist nil)
>   (setf (alist-get 'foo my-alist) "foo-value")
>
> would return "foo-value", but infact it returns ((foo . "foo-value")).
> As soon as there is an association for 'foo, it returns the new value,
> i.e., "foo-value".

I agree.  I think fixing should be quite straightforward: