Made the Rails version with whitelisting explicit
Made the Rails version with whitelisting explicit

A 'later version' of Rails was described, but this confused me a little.
I just made the Rails version explicit. Whitelisting was added in Rails 3.2.
rebecca-eakins/strong_parameters,iamjarvo/strong_parameters,rails/strong_parameters,michael-gabenna/strong_parameters,begriffs/strong_parameters