Eliminate call to inefficient String(String) constructor.

git-svn-id: https://svn.apache.org/repos/asf/xalan/java/trunk@1225446 13f79535-47bb-0310-9956-ffa450edef68

src/org/apache/xml/serializer/dom3/DOM3TreeWalker.java

@@ -537,7 +537,7 @@ protected void serializeDocType(DocumentType node, boolean bStart)
                     dtd.append(fNewLine);
                     dtd.append(internalSubset);
                     dtd.append("]>");
-                    dtd.append(new String(fNewLine));
+                    dtd.append(fNewLine);
 
                     writer.write(dtd.toString());
                     writer.flush();