Added commas to standalone example

[judasane]

Standalone example was triggering an error because the object operation had syntax errors. I added commas to fix it

TODO:

• [x] Make sure all of new logic is covered by tests and passes linting
• [ ] Update CHANGELOG.md with your change

[apollo-cla]

@judasane: Thank you for submitting a pull request! Before we can merge it, you'll need to sign the Apollo Contributor License Agreement here: https://contribute.apollographql.com/