```ruby

module DataTables
  def self.root
    @root ||= Pathname.new(File.dirname(File.expand_path(File.dirname(__FILE__), '/../')))
  end
end
```

Clean up root path expansion utility
user
```ruby

module DataTables
  def self.root
    @root ||= Pathname.new(File.expand_path('../', File.dirname(__FILE__)))
  end
end
```
assistant