The @dart marker should only be used for released language versions,
rather than the upcoming release, since the upcoming language features
has not been finally assigned to a language version yet. The appropriate
experiments should be used instead to opt into upcoming features.
This change is part of the effort to make it possible to easily bump
tools/VERSION without unexpected issues whenever tests have to have
their pinned language versions updated as well.
Bug: b/304745266
Change-Id: If9c7f07bb8bf0482257d0476b4e7d64077e53b8d
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/330106
Commit-Queue: Jonas Termansen <sortie@google.com>
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Reviewed-by: Alexander Thomas <athom@google.com>
Jonas Termansen
4bef74a60e