Fix introduced junk in doc comment.

    ///

    /// The newly added rule is applied _after_ all previous rules.

    /// It matches all addresses and ports covered by AddrPortPattern.

    ///nn

    ///

    /// If accept is true, the rule is to accept addresses that match;

    /// if accept is false, the rule rejects such addresses.

    pub fn push(&mut self, kind: RuleKind, pattern: AddrPortPattern) {