David Pedersen 618d2bfc71
macros: various error message improvements (#3677)
Improves a few of the error messages for `#[tokio::main]` and `#[tokio::test]`.

Also adds a note to the docs about `start_paused` requiring the `test-util` feature which wasn't mentioned previously.
2021-04-05 22:40:42 +02:00
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