symfony/symfony — pull request #11168 by Tobion (2014-06-18 18:00:21+00:00)
Title: [YAML] fix merge node (<<)

| Q | A
| ------------- | ---
| Bug fix? | yes
| New feature? | no
| BC breaks? | yes but according to spec
| Deprecations? | no
| Tests pass? | yes
| Needs merge to | 2.5
| Fixed tickets | #11142 and #11154
| License | MIT
| Doc PR | —

First commit small refactoring.
Second fixes #11154 (causing a BC break for a less common feature)
Third fixes #11142