symfony/symfony-docs — pull request #3886 by ahsio (2014-05-28 15:51:16+00:00)
Title: [Components][Form] Fixed version specific examples of some form events.

| Q | A
| ------------- | ---
| Doc fix? | yes
| New docs? | no
| Applies to | 2.3
| Fixed tickets |

* Examples that point to DataCollectorListener (added since 2.4) should be removed (or adapted when it's possible).
* This fix only applies to 2.3.