you rarely want ^ or $ in validations, use \A when you mean \A

activemodel/lib/active_model/validations/validates.rb

@@ -28,7 +28,7 @@ module ClassMethods
       #   class EmailValidator < ActiveModel::EachValidator
       #     def validate_each(record, attribute, value)
       #       record.errors[attribute] << (options[:message] || "is not an email") unless
-      #         value =~ /^([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})$/i
+      #         value =~ /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\z/i
       #     end
       #   end
       #
@@ -48,7 +48,7 @@ module ClassMethods
       #
       #     class TitleValidator < ActiveModel::EachValidator
       #       def validate_each(record, attribute, value)
-      #         record.errors[attribute] << "must start with 'the'" unless value =~ /^the/i
+      #         record.errors[attribute] << "must start with 'the'" unless value =~ /\Athe/i
       #       end
       #     end
       #