class Nokogiri::XML::Node

def to_html options = {}

use Node#to_xhtml instead.
See Node#write_to for a list of +options+. For formatted output,

doc.to_html

Serialize this Node to HTML
## 
def to_html options = {}
  # FIXME: this is a hack around broken libxml versions
  return dump_html if Nokogiri.uses_libxml? && %w[2 6] === LIBXML_VERSION.split('.')[0..1]
  options[:save_with] ||= SaveOptions::FORMAT |
                          SaveOptions::NO_DECLARATION |
                          SaveOptions::NO_EMPTY_TAGS |
                          SaveOptions::AS_HTML
  serialize(options)
end