Function sync

core/cb.addons/require-tools/less/lessc.js:139–144

()

    function restore() { chunks[j] = temp, i = memo, current = i; }

    function sync() {
        if (i > current) {
            chunks[j] = chunks[j].slice(i - current);
            current = i;
        }
    }
    function isWhitespace(c) {
        // Could change to \s?
        var code = c.charCodeAt(0);