WIP ADAM fix to serializer - consider rewriting the writeChars() meth…

…od to only use one loop

exist-core/src/main/java/org/exist/util/serializer/XMLWriter.java

@@ -376,7 +376,7 @@ public void characters(final CharSequence chars) throws TransformerException {
             if(tagIsOpen) {
                 closeStartTag(false);
             }
-            writer.append(chars);
+            writeChars(chars, false);
         } catch(final IOException ioe) {
             throw new TransformerException(ioe.getMessage(), ioe);
         }