module Nokogiri::XML::PP::Node

def inspect
  attributes = inspect_attributes.reject do |x|
    attribute = send(x)
    !attribute || (attribute.respond_to?(:empty?) && attribute.empty?)
  rescue NoMethodError
    true
  end.map do |attribute|
    "#{attribute.to_s.sub(/_\w+/, "s")}=#{send(attribute).inspect}"
  end.join(" ")
  "#<#{self.class.name}:#{format("0x%x", object_id)} #{attributes}>"
end

def pretty_print(pp)
  nice_name = self.class.name.split("::").last
  pp.group(2, "#(#{nice_name}:#{format("0x%x", object_id)} {", "})") do
    pp.breakable
    attrs = inspect_attributes.filter_map do |t|
      [t, send(t)] if respond_to?(t)
    end.find_all do |x|
      if x.last
        if COLLECTIONS.include?(x.first)
          !x.last.empty?
        else
          true
        end
      end
    end
    pp.seplist(attrs) do |v|
      if COLLECTIONS.include?(v.first)
        pp.group(2, "#{v.first.to_s.sub(/_\w+$/, "s")} = [", "]") do
          pp.breakable
          pp.seplist(v.last) do |item|
            pp.pp(item)
          end
        end
      else
        pp.text("#{v.first} = ")
        pp.pp(v.last)
      end
    end
    pp.breakable
  end
end