- Ban T[] array syntax
 - Format arrow function arguments consistently

Bug: v8:7327
Notry: true
Change-Id: I072a352ec9009948392a6bb5dd4381d4993af7be
Reviewed-on: https://chromium-review.googlesource.com/c/1405317
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58759}