72aceb7732
`dart analyze --format=json` has extra output, which must be removed before it can be read by the machine. R=dacoharkes@google.com, fishythefish@google.com, scheglov@google.com Bug: https://github.com/dart-lang/sdk/issues/54877 Change-Id: I8047a987b65eb8309ef33603cdaf401a400d550b Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/351840 Reviewed-by: Ben Konyi <bkonyi@google.com> Auto-Submit: Kzrnm <gengesa@gmail.com> Reviewed-by: Daco Harkes <dacoharkes@google.com> Commit-Queue: Brian Wilkerson <brianwilkerson@google.com> Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>