Add and flesh out examples throughout the spec.
Review Request #11698 — Created July 1, 2021 and submitted
This adds examples for all options and metadata keys, and both improves
and fixes up some of the examples for sections.
There's still room for improvement here, but it should make it a lot
easier for others to ensure that their implementations are correct.
Built the docs. Checked all the examples to ensure they were correct.
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