Link changes style after being edited

Follow this steps to reproduce:

• switch to Source tab and set the content to:

  * [[XWiki>>http://www.xwiki.com]]^^TM^^
  

• switch to WYSIWYG tab and place the caret inside the link
• choose "Edit Link.." from the "Link" menu
• check "Open in new window" and apply changes
• the result is

  * ^^[[XWiki>>http://www.xwiki.com/||rel="__blank"]]TM^^
  

As you can see the link has superscript style after being edited.