anchor.diff:  <%
           sprint_begin = nil
           sprint_end = nil
  +
           sprints.each do |sprint|
             sprint_id = sprint.keys.first
             while sprint_id.last == 0
  
positive.code: 
            unless sprint_end
              sprint_end = trello.sprint_card.due.to_date
              (sprints.length - 3).times do
                trello.sprint_length_in_weeks.times{sprint_end = sprint_end.previous(trello.sprint_end_day.to_sym)}
              end
            end
  
negative.code:           sprints << {sprint_id => cards}
          end
          sprints = sprints.sort_by { |sprint| sprint.keys.first }
          max_sprints_length = [options.sprints + options.offset.to_i, sprints.length].min
  
          pre_sprint_count = 0
          sprints.each do |sprint|
            pre_sprint_count += 1 if sprint.keys.first.first > 9999990
          end
  
          if options.offset
            sprints = sprints.last(options.sprints + options.offset).first(options.sprints)
          else
  