docs: function() {
      var tok = this.scan(/^#([\w-]+)/, 'id');
      if (tok) {
        this.tokens.push(tok);
        this.incrementColumn(tok.val.length);
        return true;
      }
      if (/^#/.test(this.input)) {
        this.error('INVALID_ID', '"' + /.[^ \t\(\#\.\:]*/.exec(this.input.substr(1))[0] + '" is not a valid ID.');
      }
    }