Parsing XML with Nokogiri

nokogiri_demo.rb

#!/usr/bin/env ruby
require 'nokogiri'

xml = <<XML_END
<?xml version="1.0"?>
<root><this><document><is>truncated
XML_END

puts "Original:"
puts xml

puts "\nNokogiri:"
puts Nokogiri::XML(xml).to_xml

puts "\nNokogiri strict:"
begin
  puts Nokogiri::XML(xml, nil, nil, Nokogiri::XML::ParseOptions::STRICT).to_xml
rescue Nokogiri::XML::SyntaxError => e
  puts e
end

output.txt

Original:
<?xml version="1.0"?>
<root><this><document><is>truncated

Nokogiri:
<?xml version="1.0"?>
<root>
  <this>
    <document>
      <is>truncated
</is>
    </document>
  </this>
</root>

Nokogiri strict:
Premature end of data in tag root line 2