emberjs/ember.js — pull request #3875 by rjackson (2013-12-06 18:20:03+00:00)
Title: [FEATURE propertyBraceExpansion] Ensure __ember_observes__ is set properly.

The refactor in 5d95885 to allow only the declarative form of expansion caused
the `__ember_observes__` property to be unset when the feature was enabled.

This was identified while fixing the Travis asset publishing and build
failures in #3863.

@twokul / @rjackson

/cc @hjdivad