Suggestion: use default prettier settings

[mikemaccana]

I noticed the Token Extension examples look odd and thought there wasn't any linter set up, and then I saw #7115.

Suggestion: use two spaces per prettier defaults, StandardJS, node style guide, idiomatic JS, AirBnB style guide, MDN, Google Style guide, codepen, and jsfiddle.

Not my own personal preference, but if you want people to use your examples, it's better to fit in.

[buffalojoec]

PRs welcome! Can't say for sure we'll use all of them, so maybe best to do one at a time. Regardless happy to consider better formatting.