title: How to add linebreak to textContent in $mdDialog
body: <p>I want to add line break in .textcontent of mdDiaglog.
  Following is my code:</p>
  
  <pre><code>var confirm = $mdDialog.confirm()
          .title('Refresh')
          .textContent('Some information will be lost.'+'&lt;br&gt;'+ 'Do you want to refresh?')
          .targetEvent(ev)
          .ok('YES')
          .cancel('NO');
    $mdDialog.show(confirm).then(function () {
            $window.location.reload();
    });
  }
  </code></pre>