class Sass::Tree::PropNode

def declaration(tabs = 0, opts = {:old => @prop_syntax == :old}, fmt = :sass)
  name = self.name.map {|n| n.is_a?(String) ? n : "\#{#{n.to_sass(opts)}}"}.join
  if name[0] == ?:
    raise Sass::SyntaxError.new("The \"#{name}: #{self.class.val_to_sass(value, opts)}\" hack is not allowed in the Sass indented syntax")
  end
  old = opts[:old] && fmt == :sass
  initial = old ? ':' : ''
  mid = old ? '' : ':'
  "#{'  ' * tabs}#{initial}#{name}#{mid} #{self.class.val_to_sass(value, opts)}".rstrip
end