# File lib/nyan_cat_formatter/common.rb, line 187
    def highlight(mark = PASS)
      case mark
      when PASS; rainbowify PASS_ARY[@color_index%2]
      when FAIL; "\e[31m#{mark}\e[0m"
      when ERROR; "\e[33m#{mark}\e[0m"
      when PENDING; "\e[33m#{mark}\e[0m"
      else mark
      end
    end