mongoid/mongoid — pull request #2752 by arthurnn (2013-01-27 19:47:28+00:00)
Title: Dont clear persistence_options when loading revision [ Fixes #2743]

This probably will be removed in version 4.0 as we are removing Versioning module, but this is a fix for version 3, which was cleaning the persistence options on the Versioning select https://github.com/mongoid/mongoid/blob/master/lib/mongoid/versioning.rb#L131