Suggest `-> impl Trait` and `-> Box<dyn Trait>` on fn that doesn't return#70998

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estebank:suggest-impl-trait-empty-fn

Apr 22, 2020

Commits on Apr 20, 2020

Suggest `-> impl Trait` and `-> Box<dyn Trait>` on fn that doesn't return
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Ensure tail expression will have a `Ty` for E0746
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