Fix after review

Author: slawekjaranowski

src/main/java/org/codehaus/plexus/util/xml/PrettyPrintXMLWriter.java

@@ -26,7 +26,7 @@
 /**
  * <p>Implementation of XMLWriter which emits nicely formatted documents.</p>
  *
- * <p>C0 controls chars are omitted from output</p>
+ * <p>C0n control characters except <code>\n</code>, <code>\r</code>, and <code>\t</code> are omitted from output</p>
  */
 public class PrettyPrintXMLWriter implements XMLWriter {
     /** Line separator ("\n" on UNIX) */

src/main/java/org/codehaus/plexus/util/xml/pull/MXSerializer.java

@@ -24,7 +24,7 @@
  * <li>PROPERTY_SERIALIZER_INDENTATION
  * <li>PROPERTY_SERIALIZER_LINE_SEPARATOR
  * </ul>
- * <p>C0 controls chars are omitted from output</p>
+ * <p>C0n control characters except <code>\n</code>, <code>\r</code>, and <code>\t</code> are omitted from output</p>
  */
 public class MXSerializer implements XmlSerializer {
     protected static final String XML_URI = "http://www.w3.org/XML/1998/namespace";