[BUGFIX release-1-13] Prevent `classNames` from being duplicated.#12784

Merged

stefanpenner merged 2 commits intoemberjs:release-1-13from Dhaulagiri:br-class-names

Jan 8, 2016

+11-7

Commits on Jan 8, 2016

Add a failing test that checks if classNames in DOM reflect the components classNames

fpauser
authored and
Dhaulagiri
committed
[BUGFIX beta] Prevent classNames from being duplicated.

rwjblue
authored and
Dhaulagiri
committed