# File lib/kramdown/options.rb, line 137
    def self.simple_array_validator(val, name, size)
      if String === val
        val = val.split(/,/)
      elsif !(Array === val)
        raise Kramdown::Error, "Invalid type #{val.class} for option #{name}"
      end
      if val.size != size
        raise Kramdown::Error, "Option #{name} needs exactly #{size} values"
      end
      val
    end