typo

Author: kfyodor

lib/active_model/serializer.rb

@@ -102,7 +102,7 @@ def has_many(*attrs)
       def build_serializer_class(resource, options)
         "".tap do |klass_name|
           klass_name << "#{options[:namespace]}::" if options[:namespace]
-          klass_name << options[:prefix].to_s.classify       if options[:prefix]
+          klass_name << options[:prefix].to_s.classify if options[:prefix]
           klass_name << "#{resource.class.name}Serializer"
         end
       end