class Tilt::BuilderTemplate

def evaluate(scope, locals, &block)
  xml = ::Builder::XmlMarkup.new(:indent => 2)
  if data.respond_to?(:to_str)
    locals[:xml] = xml
    super(scope, locals, &block)
  elsif data.kind_of?(Proc)
    data.call(xml)
  end
  xml.target!
end