```ruby
module AlterMvc::Constants

  VIEWABLE_ACTIONS = %w{new show edit}

  RESPONDER_TYPES = %w{html js json}

end```

Change json to format in responder types
user
```ruby
module AlterMvc::Constants

  VIEWABLE_ACTIONS = %w{new show edit}

  RESPONDER_TYPES = %w{html js format}

end```
assistant