* lisp/emacs-lisp/copyright.el (copyright-at-end-flag) (copyright-names-regexp): Add safety properties. (copyright-year-ranges): New option. (copyright-find-end): New function, split from copyright-update-year. (copyright-update-year): Use copyright-find-end. (copyright-fix-years): Optionally, convert years to ranges. Handle years continued over comment lines. Do not mess with the fill-prefix. Do not call copyright-update. (copyright-update-directory): Optionally, fix years rather than update. Skip directories. Find files literally, with only safe local vars. * etc/NEWS: Mention copyright-fix-years and ranges.
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