According to the language specification:
1) When 'break' is executed in the 'await for' loop (in 'main'),
the underlying stream subscription is canceled.
2) When async* function ('consume') has stopped at 'yield' or 'yield*',
and the stream is canceled, the 'yield' / 'yield*' statement returns
without an object. It also means that code in 'consume()' after
the loop is not executed and it doesn't append ")" to the log.
So the test expectations are fixed to avoid expecting trailing ")"
at the log when there is a 'break' out of the 'await for' loop.
Fixes https://github.com/dart-lang/sdk/issues/51097
Change-Id: Ia59e87ef84dcb8a0c06a47f497cc97d4c6635d27
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/285343
Reviewed-by: Lasse Nielsen <lrn@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
