c31be8ab5c
This is a reland of b817b274c2
Original change's description:
> [cfe] Disambiguate between sets and maps with spreads
>
> Change-Id: I8da95178d0864dd0d59232a902cdb142be7f135e
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/95649
> Reviewed-by: Kevin Millikin <kmillikin@google.com>
Change-Id: Id22b7513230f6410dc2af5146d292fc7fc47a0aa
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/96130
Reviewed-by: Régis Crelier <regis@google.com>