input = "\\r\\n\\t\\'\\\"\\%";
output = Utils.backQuoteChars(input);
assertTrue(">" + input + "< restored", input.equals(Utils.unbackQuoteChars(output)));
input = Utils.joinOptions(new StringToWordVector().getOptions());
output = Utils.backQuoteChars(input);
assertTrue(">" + input + "< restored", input.equals(Utils.unbackQuoteChars(output)));
}