test.py's output is truncated to a certain length to avoid
tests flooding the terminal.
However, the way it's implemented it likely cuts off a line
of output at an arbitrary point, and then prints its own
message to let the user know the truncation happened.
This ultimately means that said message will often be hard to
spot as it flows together with the output.
This change makes sure there is always a newline at the end
of the output, ensuring the message will be on its own line.
TEST=Manual testing locally.
Change-Id: I91146ce7ce3d4fb0a35465a77aaf783df2acf4b7
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/241742
Reviewed-by: William Hesse <whesse@google.com>
Commit-Queue: Clement Skau <cskau@google.com>
Clement Skau
af2de233e5