angular/angular.js — pull request #10313 by yannickadam (2014-12-03 18:55:03+00:00)
Title: Week formatter fix in date filter (Comply to ISO8601)

ISO8601 mandates that a week starts on a Monday, and ends on a Sunday.

The test case was on a Friday, and did not show that W3 was returned instead of W2.
http://plnkr.co/edit/897MdGDME67aIQmLpzqZ