# File lib/diffy/diff.rb, line 108
    def each_chunk
      old_state = nil
      chunks = inject([]) do |cc, line|
        state = line.each_char.first
        if state == old_state
          cc.last << line
        else
          cc.push line.dup
        end
        old_state = state
        cc
      end

      if block_given?
        chunks.each{|chunk| yield chunk }
      else
        chunks.to_enum
      end
    end