Ben Barham fabb02100f [Test] Add @escaping to async refactoring tests ...

The async refactorings ignore whether a completion handler had
`@escaping` or not. In preparation of fixing this, fix up all functions
to have `@escaping` for their completion handler parameter.

Also some small miscellaneous fixes in order to reduce the number of
warnings output on test failures and also the addition of `REQUIRES:
concurrency` on all tests.

2021-07-24 09:53:17 +10:00

713 B

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