rst escaping produces different text and xhtml output
When sending \o/, rst produces a different output for html and for text part of the message :
\<message to="jabberfr@chat.jabberfr.org" type="groupchat" id="121">
\<body>\\o/ \o/\</body>
\<html xmlns="http://jabber.org/protocol/xhtml-im">
\<body xmlns="http://www.w3.org/1999/xhtml">
\<p>\o/ o/\</p>
\</body>
\</html>
\</message>
rst should not escape \o to o, or we should escape \ before passing it to docutils