class Sass::Tree::Node

def to_s
  result = String.new
  children.each do |child|
    if child.is_a? AttrNode
      raise SyntaxError.new('Attributes aren\'t allowed at the root of a document.', child.line)
    else
      result << "#{child.to_s(1)}" + (@style == :compressed ? '' : "\n")
    end
  end
  @style == :compressed ? result+"\n" : result[0...-1]
end