[test] Clean-up: Fix indentation and quotation

This has no logic changes intended.

Bug: v8:8971
Change-Id: I6d35096cd5e0ea189006ba7a5663606f101ccab9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1564051Reviewed-by: Sergiy Belozorov <sergiyb@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60766}