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Update generic_event.rst

The $event['data'] field was not set, thus it wouldn't be modified.Also, the example already had a lowercase string. Uppercased 1 letter.

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Lines changed: 2 additions & 2 deletions

Original file line number	Diff line number	Diff line change
`@@ -93,7 +93,7 @@ Filtering data::`
`93`	`93`
`94`	`94`	`use Symfony\Component\EventDispatcher\GenericEvent;`
`95`	`95`
`96`		`- $event = new GenericEvent($subject, array('data' => 'foo'));`
	`96`	`+ $event = new GenericEvent($subject, array('data' => 'Foo'));`
`97`	`97`	`$dispatcher->dispatch('foo', $event);`
`98`	`98`
`99`	`99`	`echo $event['data'];`
`@@ -102,6 +102,6 @@ Filtering data::`
`102`	`102`	`{`
`103`	`103`	`public function filter(GenericEvent $event)`
`104`	`104`	`{`
`105`		`- strtolower($event['data']);`
	`105`	`+$event['data'] =strtolower($event['data']);`
`106`	`106`	`}`
`107`	`107`	`}`

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