I started adding support for failing (crashing) mjsunit tests, until I realized that we can just write them as filecheck tests (see https://crbug.com/482003887). These are some cleanups I had already piled up, plus some "git cl format" changes. R=machenbach@chromium.org Change-Id: Ieaf3d09c5ea33c8a7449b5ed1e2965429db51396 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/7545068 Commit-Queue: Clemens Backes <clemensb@chromium.org> Reviewed-by: Michael Achenbach <machenbach@chromium.org> Cr-Commit-Position: refs/heads/main@{#105125}