class Opal::Nodes::StringNode

def translate_escape_chars(inspect_string)
  inspect_string.gsub(ESCAPE_REGEX) do |original|
    if Regexp.last_match(1).length.even?
      original
    else
      Regexp.last_match(1).chop + ESCAPE_CHARS[Regexp.last_match(2)]
    end
  end
end