[front_end] fix a long line in a test helper file

Change-Id: I1bdf3390c0c84f2d934620d6dee69a162aa1541b
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/134417
Reviewed-by: Jens Johansen <jensj@google.com>
Commit-Queue: Devon Carew <devoncarew@google.com>
This commit is contained in:
Devon Carew 2020-02-06 20:19:02 +00:00 committed by commit-bot@chromium.org
parent eb075dcc21
commit 6701595458

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