class Tilt::NokogiriTemplate

def evaluate(scope, locals, &block)
  xml = ::Nokogiri::XML::Builder.new
  if data.respond_to?(:to_str)
    locals[:xml] = xml
    block &&= proc { yield.gsub(/^<\?xml version=\"1\.0\"\?>\n?/, "") }
    super(scope, locals, &block)
  elsif data.kind_of?(Proc)
    data.call(xml)
  end
  xml.to_xml
end