6bcba2529d
These changes make the help message more aligned with other dart command line tools. Fixes https://github.com/dart-lang/sdk/issues/47515 Change-Id: Id012400dc9b441b796c7437858e8ea4f29b57a90 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/229340 Reviewed-by: Joshua Litt <joshualitt@google.com> Commit-Queue: Sigmund Cherem <sigmund@google.com>