laravel/framework — pull request #4590 by jeremyworboys (2014-06-05 23:03:30+00:00)
Title: Fix nested arrays getting split when using numeric keys

This expands on #2680 specifically @asiral's [comment](https://github.com/laravel/framework/pull/2680#issuecomment-33502878) to join nested arrays that are numerically keyed.