DX: comment the examples in rule definition

As this is genearte error in both phpunits and php-cs-fixer

utils/rector/src/Rector/ChillBundleAddFormDefaultDataOnExportFilterAggregatorRector.php

@@ -32,7 +32,7 @@ class ChillBundleAddFormDefaultDataOnExportFilterAggregatorRector extends Abstra
     {
         return new RuleDefinition(
             'Add a getFormDefault data method on exports, filters and aggregators, filled with default data',
-            [
+            [/*
                 <<<PHP
 use Chill\MainBundle\Export\FilterInterface;
 use Chill\MainBundle\Form\Type\PickRollingDateType;
@@ -83,7 +83,7 @@ class MyClass implements FilterInterface
         return ['foo' => new RollingDate(RollingDate::T_TODAY), 'baz' => 'Castor'];
     }
 }
-PHP
+PHP */
             ]
         );
     }