mongoid/moped — pull request #213 by Lytol (2013-09-21 21:23:15+00:00)
Title: Fix examples for `update_all` to use `$set`

This tripped me up the other day, so I thought I'd save the next guy some time. It should be updated on the mongoid.org site as well: http://mongoid.org/en/moped/docs/driver.html