cakephp/docs — pull request #1425 by cincodenada (2014-06-17 00:24:13+00:00)
Title: Clarifying behavior of 'unique' option in HABTM

The docs here were unclear and - in the case of `false` - not even sensical. I've edited the copy to reflect the behavior as I understand it after reading the code and doing some tests to confirm.