[llvm-branch-commits] [llvm] [MC] Rewrite stdin.s to use python (PR #157232)

[Paul Kirth via llvm-branch-commits]

https://github.com/ilovepi approved this pull request.

LGTM. IMO this is a much nicer way to test a property on `stdin`'s positioning. Lets get a bit more consensus from other maintainers before landing though.

https://github.com/llvm/llvm-project/pull/157232