- # Tell the update-copyright script that we do not want it to
- # repeat the prefixes in MULTILINE_COMMENT_PREFIXES.
- os.environ['MULTILINE_COMMENT_PREFIXES'] = \
- '\n'.join(MULTILINE_COMMENT_PREFIXES)
- # We want to use year intervals in the copyright notices.
- os.environ['UPDATE_COPYRIGHT_USE_INTERVALS'] = '1'
+ # We want to use year intervals in the copyright notices, and
+ # all years should be collapsed to one single year interval,
+ # even if there are "holes" in the list of years found in the
+ # original copyright notice (OK'ed by the FSF, case [gnu.org #719834]).
+ os.environ['UPDATE_COPYRIGHT_USE_INTERVALS'] = '2'