Link is duplicated after being edited

Follow this steps to reproduce:

• switch to Source tab and set the content to

  before [[XWiki>>http://www.xwiki.org]] after
  

• 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 this:

  [[XWiki>>http://www.xwiki.org||rel="__blank"]]before [[XWiki>>http://www.xwiki.org]] after
  

As you can see the link was duplicated.