Do not use insecure multiline regex in examples
Do not use insecure multiline regex in examples

ActiveModel >= 4.0 will raise a security related exception with the old example unless `multiline: true` is set as well. This doesn't make much sense for these use cases.

More info: http://guides.rubyonrails.org/security.html#regular-expressions
Relevant commit: https://github.com/rails/rails/commit/bc7c0b5c108ef47b24bb91c502429935bb34d214
joost/phony_rails