如何在$ mdDialog中的textContent中添加换行符

我想在mdDiaglog的.textcontent中添加换行符。以下是我的代码：

var confirm = $mdDialog.confirm()
        .title('Refresh')
        .textContent('Some information will be lost.'+'<br>'+ 'Do you want to refresh?')
        .targetEvent(ev)
        .ok('YES')
        .cancel('NO');
  $mdDialog.show(confirm).then(function () {
          $window.location.reload();
  });
}