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