Fix tests to not use deprecated yeoman functions.

Fixed unit tests so they don't use deprecated yeoman test helper functions.

Saw these two errors when running the unit tests:
`assert.files deprecated. Use assert.file([String, String, ...]) or assert.file([[String, RegExp], [String, RegExp]...]) instead.`

`assert.file(String, RegExp) DEPRECATED; use assert.fileContent(String, RegExp) instead.`

and fixed some formatting and dead lint directives.

![bowling is kool](http://i.imgur.com/1k8Q4BC.gif)