* test/lisp/emacs-lisp/rmc-tests.el (test-read-multiple-choice): Rebind read-event, read-multiple-choice uses that since 2019-05-26 "Avoid infloop in read-multiple-choice (Bug#32257)".
Run 'TZ=UTC0 admin/update-copyright $(git ls-files)'.
Run admin/update-copyright.
* lisp/emacs-lisp/rmc.el: Require seq (Bug#28975). * test/lisp/emacs-lisp/rmc-tests.el (test-read-multiple-choice): Add test.