Fix experiment validation test code
Fix experiment validation test code

Fix incorrect output from experiment validation code.

Change-Id: Ia44913f94b81bd08152fe2b98da889246cb49ce9
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/235340
Reviewed-by: Srujan Gaddam <4175f2f2dd3cde6c8ffb10fc9674dc09abf813fe@google.com>
Reviewed-by: Kevin Moore <1d6e7d10d051cf619c5282da3c28fd8d3e0a65a4@google.com>
Commit-Queue: Leaf Petersen <9bef692239b5f624cec8e2cd5249ab1939a377aa@google.com>

dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk