Problem Retrieving with summary of a workitem.

Hello Team
 I am trying to retrieve the summary field of a workitem using
String summary = currentWorkItem.getHTMLSummary().getPlainText();

 I am able to Get the summary information of all workitems .

But In some Workitems Summary It returns the result along with "\r\n " at the end .
If i try to remove it using trim() method its not working .

Whether i am using correct method to retrieve the summary ?

Is there any Other method to remove the "\r \n " from the summary ?

If i try to retrive summary using currentWorkItem.getHTMLSummary().toString(),
for some workitems summary it returns "<br/>" at the end.
Why it returns "<br/>" only for few workitem?

Please Help :(

Thank You in Advance