_insert_attributes

# File actionpack/lib/action_view/vendor/builder/xmlmarkup.rb, line 288
    def _insert_attributes(attrs, order=[])
      return if attrs.nil?
      order.each do |k|
        v = attrs[k]
        @target << %{ #{k}="#{v}"} if v
      end
      attrs.each do |k, v|
        @target << %{ #{k}="#{v}"} unless order.member?(k)
      end
    end