Re: emacs-29 9ecebcdded: * lisp/simple.el (next-completion): Handle first completion specially.

[Juri Linkov]

>     Eli> Fixed.  It's a clear case of a test that adapted the results to what
>     Eli> the code produced, not to the desired/expected value.
>
> Itʼs fixed, but Iʼll admit that I donʼt understand why:
>
>       (should (equal "aa" (get-text-property (point) 'completion--string)))
>       (next-completion 3)
>       (should (equal "ac" (get-text-property (point) 'completion--string)))
>       (previous-completion 2)
>       (should (equal "aa" (get-text-property (point) 'completion--string)))
>
> So we go forward 3 from "aa" to get to "ac", but then to get back to
> "aa" itʼs back 2?

Indeed, the test was correct, but the implementation has a bug.