Hi hackers. I have seen this copyright notification in patches introducing new files in 2008:
Copyright (C) 2007, 2008 Free Software Foundation For any new file created in YYYY then the copyright notification should be Copyright (C) YYYY Free Software Foundation Only if the file is modified in YYYY+N the second year should be added: Copyright (C) YYYY, YYYY+N Free Software Foundation See http://www.gnu.org/prep/maintain/maintain.html#Copyright-Notices for more details. Thanks!
