Alex Hoppen f7c7599a8c [Async Refactoring] Add return keyword if wrapping ReturnStmt is implicit ...

Previously, in the following case we were failing to add a `return` keyword inside `withImplicitReturn`.
```
func withImplicitReturn(completionHandler: (String) -> Void) {
  simple {
    completionHandler($0)
  }
}
```

This is because the call of `completionHandler($0)` is wrapped by an implicit `ReturnStmt` and thus we assumed that there was already a `return` keyword present.

Fix this issue by checking if the wrapping `ReturnStmt` is implicit and if it is, add the `return` keyword.

Fixes rdar://80009760

2021-07-01 10:21:46 +02:00

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