<link href="bootstrap/css/bootstrap.min.css" rel="external nofollow" rel="stylesheet" type="text/css"/>
<script src="res/jquery.min.js" type="text/javascript"></script>
<script src="bootstrap/js/bootstrap.min.js" type="text/javascript"></script>
<script>
 $(function () {
  $('[data-toggle="tooltip"]').tooltip();
 });
</script>
<button type="button" class="btn btn-default" data-toggle="tooltip" data-placement="left" title="${desc}">${title}</button>

<button type="button" class="btn btn-default" data-html="true" data-toggle="tooltip" data-placement="left" title="${fn:replace(desc, newline, "<br/>")}">${title}</button>

<button type="button" class="btn btn-default" data-html="true" data-toggle="tooltip" data-placement="left" title="<p align='left'>${fn:replace(desc, newline, "<br/>")}</p>">${title}</button>

<style> 
 .tooltip > p {
  text-align:left;
 }
</style>
.tooltip-inner {
  text-align:left;
}