…ted links in rdoc [ci skip]
…d links in the rdoc + some other doc fixes.[ci skip]
model.name_changed?(from: "Pete", to: "Ringo")
These methods were made "public" in 47617ec so that `method_missing` can invoke them without going through `send`, but they aren't meant for consumption from outside of Rails.
Example: >> r = /some-regexp/ => /some-regexp/ >> r.source.object_id == r.source.object_id => false