module Sass::Serializer

def serialize_quoted_string(string)
  if !string.include?('"') || string.include?("'")
    %("#{string.gsub(/[\0\\"]|[\x01-\x08\x0A-\x1F\x7F][\h\t ]?/, CSS_ESCAPE)}")
  else
    %('#{string.gsub(/[\0\\']|[\x01-\x08\x0A-\x1F\x7F][\h\t ]?/, CSS_ESCAPE)}')
  end
end

def serialize_unquoted_string(string)
  string.tr("\0", "\uFFFD").gsub(/\n */, ' ')
end