fixed here-string formating

Resubmitting pull-request. Corrected line-ending issues.
I believe that it works properly. With my change:
![__desktop_serversetup_ps1 2](https://cloud.githubusercontent.com/assets/989760/4551165/cebe6cc8-4e6d-11e4-9398-1fac4e7a7b2e.png)

Without change:
![__desktop_serversetup_ps1](https://cloud.githubusercontent.com/assets/989760/4551170/d7909d44-4e6d-11e4-9f93-3f92974aa4ee.png)

Also using the lookahead gives the same result as the unmodified syntax file.