The first line of `bin/jekyll` of the [Jekyll](https://github.com/mojombo/jekyll) gem uses the following syntax:

```
$:.unshift File.join(File.dirname(__FILE__), *%w[.. lib])

```

I can't seem to figure out what the purpose of the splat is. Running that line with and without the splat in IRB results in the same ouput `"./../lib"`.

<https://github.com/mojombo/jekyll/blob/master/bin/jekyll>