class Sass::Script::String

def to_sass(opts = {})
  if self.type == :identifier && context == :equals &&
      self.value !~ Sass::SCSS::RX::URI &&
      Sass::SCSS::RX.escape_ident(self.value).include?(?\\)
    return "unquote(#{Sass::Script::String.new(self.value, :string).to_sass})"
  else
    return to_s
  end
end