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Running the standalone VM in the following ways will result in the DartDev help message being shown: - `dart` - `dart --help` The following will output the VM help message: - `dart run` - `dart help run` - `dart --help --verbose` (includes verbose VM flags) - `dart help run --verbose` (includes verbose VM flags) - `dart run --verbose` (includes verbose VM flags) The original standalone VM behavior can be restored by providing the --disable_dart_dev flag. Change-Id: I67cf015d62366efdfd8bf9b215d4319fd5af3f46 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/144497 Commit-Queue: Ben Konyi <bkonyi@google.com> Reviewed-by: Jaime Wren <jwren@google.com>