class Sass::Tree::RuleNode

def to_scss(tabs, opts = {})
  name = selector_to_scss(rule, tabs, opts)
  res = name + children_to_src(tabs, opts, :scss)
  if children.last.is_a?(CommentNode) && children.last.silent
    res.slice!(-3..-1)
    res << "\n" << ('  ' * tabs) << "}\n"
  end
  res
end