Example cannot handle space character in path

> Please provide us with the following information:
> ---------------------------------------------------------------

### This issue is for a: (mark with an `x`)
```
- [X] bug report -> please search issues before submitting
- [ ] feature request
- [ ] documentation issue or request
- [ ] regression (a behavior that used to work and stopped in a new release)
```

### Minimal steps to reproduce
> Download repository as ZIP file into a folder on your local PC which has space character(s) in its path name. Open .sln in Visual Studio, modify Program.cs as explained in tutorial, and run.

### Any log messages given by the failure
> stderr.txt contains failure message about specified path cannot be found.

### Expected/desired behavior
> path is escaped when creating the Azure task Command Line so it works with spaces.

### OS and Version?
> Windows 10 and Visual Studio 2017, but expected to occur in any version

### Versions
>

### Mention any other details that might be useful

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> Thanks! We'll be in touch soon.

Ouvrez le fichier .sln dans Visual Studio et examinez Program.cs en suivant les étapes du tutoriel qui créent la ligne de commande Azure task. Reproduisez l’échec avec le dépôt situé dans un chemin contenant des espaces et vérifiez stderr.txt. Le travail est terminé lorsque l’exemple s’exécute correctement et que la commande générée gère les espaces dans le chemin.

Rédigé par le modèle d'indexation à partir du texte de l'issue.