Fix - docs: dt-event xhr example descriptions were reversed

- Thread 33084. Thanks friggle!

docs/event/xhr.xml

@@ -36,7 +36,7 @@
 		Please note that, as with all DataTables emitted events, this event is triggered with the `dt` namespace. As such, to listen for this event, you must also use the `dt` namespace by simply appending `.dt` to your event name, as shown in the example below.
 	</description>
 
-	<example title="Use a custom property returned from the server in another DOM element"><![CDATA[
+	<example title="Pre-process the data returned from the server"><![CDATA[
 $('#example')
 	.on('xhr.dt', function ( e, settings, json, xhr ) {
 		for ( var i=0, ien=json.aaData.length ; i<ien ; i++ ) {
@@ -49,7 +49,7 @@ $('#example')
 	} );
 ]]></example>
 
-	<example title="Pre-process the data returned from the server"><![CDATA[
+	<example title="Use a custom property returned from the server in another DOM element"><![CDATA[
 $('#example')
 	.on('xhr.dt', function ( e, settings, json, xhr ) {
 		$('#status').html( json.status );