This reverts commit 4817b7729a. It caused some `^/\n` and had some objection about its readability improvement.
4817b7729a
The convention does not add //\n. Having all RUN/CHECK lines separated by //\n makes editor movement difficult (e.g. { } in Vim).
is running on an Apple Silicon mac This change allows users to use `-arch arm64` to build for mac when running it on Apple Silicon mac without explicit `-target` option. Differential Revision: https://reviews.llvm.org/D82428