emberjs/website — pull request #1391 by nathanhammond (2014-03-21 06:05:53+00:00)
Title: Add error substate example with dynamic segments.

The mental model of a route that has a dynamic segment in it is "two layers" as evidenced by https://github.com/emberjs/ember.js/issues/4560. In order to curb the confusion I've explicitly called that out and provided an example of how to accomplish the typical goal.