old_contents: from chainer.training.triggers import interval
  from chainer.training import util
  
  
  # For backward compatibility
  IntervalTrigger = interval.IntervalTrigger
  get_trigger = util.get_trigger
  _never_fire_trigger = util._never_fire_trigger
new_contents: from chainer.training.triggers import interval
  from chainer.training import util
  
  
  # For backward compatibility
  IntervalTrigger = interval.IntervalTrigger
  get_trigger = util.get_trigger
  _never_fire_trigger = util._never_fire_trigger
  
subject: add newline