Better algorithm for short member docs.

    #

    # Ellipsis is only added when input actually gets shortened.

    def shorten(input)

      if too_long?(input)

        strip_tags(input)[0..(@max_length-4)] + "..."

      sent = first_sentence(strip_tags(input))

      if sent.length > @max_length

        sent[0..(@max_length-4)] + "..."

      elsif strip_tags(input).length > sent.length

        sent + " ..."

      else

        input

      end

    end

    def first_sentence(str)

      str.sub(/\A(.+?\.)\s.*\Z/m, "\\1")

    end

    # Returns true when input should get shortened.

    def too_long?(input)

      strip_tags(input).length > @max_length

      first_sentence(input).length > input.length || strip_tags(input).length > @max_length

    end

    def strip_tags(str)