Module: Fix test env usage example

Fixes the indentation issue in the module call, and assumes that Maker is a constructor with a build method, which the tests then call.

Also, in the QUnit issue itself I suggested to fix this by deep-copying the test environment properties. I've looked into that and concluded that its way too complicated for something that no one ever had a problem with, as far as I can tell. Instead we can just fix the example to use a new parts array for each test.

Fixes #90
Fixes jquery/qunit#688