* lisp/emacs-lisp/copyright.el (copyright-regexp) (copyright-years-regexp, copyright-update-year) (copyright-fix-years): Also include en dash. * test/lisp/emacs-lisp/copyright-tests.el (copyright-tests--data): New test cases.
Run "TZ=UTC0 admin/update-copyright".
* lisp/emacs-lisp/copyright.el: Use lexical-binding. Remove redundant :group args. * test/lisp/emacs-lisp/copyright-tests.el: New file.