```ruby
Dir[File.join(File.dirname(__FILE__), 'formatters', '*.rb')].each do |file|
  require_relative File.join('formatters', File.basename(file, '.rb'))
end
```

Use require instead of require_relative for improved Ruby 1.8 support
user
```ruby
Dir[File.join(File.dirname(__FILE__), 'formatters', '*.rb')].each do |file|
  require file
end
```
assistant