Run admin/update-copyright in the master branch. This fixes files that were not already fixed in the emacs-25 branch before it was merged here.
* lisp/emacs-lisp/ring.el (ring-elements): Don't use the RESULT argument of `dotimes' when the iteration variable isn't referred by it. (ring-member): Don't pass nil as the RESULT argument of `dotimes' since it's the default.
* test/lisp/emacs-lisp/ring-tests.el: New file with tests for ring.el.