emberjs/ember.js — pull request #2438 by twinturbo (2013-04-10 16:42:12+00:00)
Title: Allow nested route calls

There is no technical reason for this to exist. @wycats told me it was there to clarify the difference between `resource` and `route`. Nesting routes allows you to create more substates when needed. Nesting resources does not solve this problem.