Fix overriding generate_message option in validate_each

Fixes #65

Author: alexdunae

lib/validates_email_format_of/active_model.rb

@@ -9,7 +9,7 @@ module ActiveModel
   module Validations
     class EmailFormatValidator < EachValidator
       def validate_each(record, attribute, value)
-        (ValidatesEmailFormatOf.validate_email_format(value, options.merge(generate_message: true)) || []).each do |error|
+        (ValidatesEmailFormatOf.validate_email_format(value, options) || []).each do |error|
           record.errors.add(attribute, error)
         end
       end