New lines added when parsing and re-rendering groups in xwiki/2.1

Steps to reproduce :

Create a new page (eg Sandbox.TestPage.WebHome with the following content :

(((


)))

In a second page, put the following script :

{{velocity}}
#set($xdom = $xwiki.getDocument('Sandbox.TestPage.WebHome').getXDOM())
#set($rendered = $services.rendering.render($xdom, 'xwiki/2.1'))
{{code language="none"}}
$rendered
{{/code}}
{{/velocity}}

Expected : the code macro resulting of the script execution should contain the same content as the content of Sandbox.TestPage.WebHome.

Actual : the code macro contains an extra blank line in between the group parenthesis, as such :

(((



)))

To quote tmortagne :

problem is that the last NL (new line) is not "consumed" by the parser as the renderer seems to expect