symfony/symfony — pull request #12407 by issei-m (2014-11-04 03:19:26+00:00)
Title: [EventDispatcher] added comment to EventDispatcher to explain intention of array_filter()

| Q | A
| ------------- | ---
| Bug fix? | no
| New feature? | no
| BC breaks? | no
| Deprecations? | no
| Tests pass? | yes
| License | MIT