Wrong sorting with files in deep directory structure

I have a directory structure similar to the following:

```
app
\-main
\-app.js
\-admin
\-item
\-itemController.js
```

`app.js` has a module deifined `angular.module('app', [])`
`itemController.js` adds a controller to app module `angular.module('app').controller(...)`

Sorting result puts `itemController.js` before `app.js`.
When I tried putting 'itemController.js' one level higher (in admin directory) sorting worked as expected.

Reproduce the sorting result with the structure shown, using app.js for angular.module('app', []) and itemController.js for the controller registration. Trace how the sorter handles these files at different directory depths; done means itemController.js is placed after app.js while the reported structure remains supported.

Written by the indexing model from the issue text.