Avoid JSHint unused error when importing helpers
Avoid JSHint unused error when importing helpers

Currently the documentation suggests that you need to import your custom test helper in `start-app.js`.
While this is true, the documented import syntax will cause a failing JSHint test on `start-app.js` because the imported test helper is not directly begin used.
I think the documentation should suggest to import using `import "./helper"` instead of `import "helper" from "./helper"`.
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