bug#239: 23.0.60; \ is considered whitespace syntax in Lisp mode?

[Drew Adams]

> The SYNTAX argument to skip-syntax-forward and -backward is not a
> regexp.
> 
> The argument in the example above means to skip any character with any
> of 3 syntax classes:
>       \       escape
>       s       [not a valid syntax class]
>       -       whitespace

Yes, someone else already pointed that out.
Thanks.