emberjs/ember.js — pull request #3747 by trek (2013-11-16 15:20:03+00:00)
Title: [DOC] Clarifies typical sendAction use

The previous docs focused heavily on the default behavior of sendAction
instead of the more typical use through configuration and this led
to some feedback about confusion, especially how it overlapped with
plain {{action}} use in the components own template.

closes #3644.

@didorothy does this better explain it for you?