Description:
------------
If you load a xml document that contains \r they are silently replaced by \n, even in CDATAs.
No matter to what ignoreWhiteSpace is set.

Reproduce code:
---------------
<?php
$doc = new DomDocument;
$xml = "<?xml version=\"1.0\"?><foo>\r \r\n <![CDATA[\r]]></foo>";
$doc->loadXml($xml);
var_dump(substr_count($doc->saveXml(), "\r"));
var_dump(substr_count($doc->saveXml(), "\n"));

Expected result:
----------------
int(3) int(1) 

This is the output of:
var_dump(substr_count($xml, "\r"));
var_dump(substr_count($xml, "\n"));

Actual result:
--------------
int(0) int(5)