code: function parse_BoolErr(blob, length, opts) {
  	var cell = parse_XLSCell(blob, 6);
  	if(opts.biff == 2) ++blob.l;
  	var val = parse_Bes(blob, 2);
  	cell.val = val;
  	cell.t = (val === true || val === false) ? 'b' : 'e';
  	return cell;
  }
docs: /* [MS-XLS] 2.4.24