emberjs/ember.js — pull request #5106 by chrmod (2014-07-03 20:38:18+00:00)
Title: [docs] [bugfix] for `itemView` option of `each` helper 

In ember-cli world where we encourage people to register all views in container, it is nice to provide `each` helper item view with `itemView` syntax, not with `itemViewClass`. Having this info in docs should speed up adoption of new pattern.

By this occasion a bugfix was applied to disable `group` mode if `itemView` option was specified.