[llvm] [UTC] CHECK-EMPTY instead of skipping blank lines (PR #165718)

[Nikita Popov via llvm-commits]

nikic wrote:

Yes, this definitely needs to be versioned, as it's going to cause a massive amount of churn. You can add it to version 7 instead of creation a new one, as it's not the DEFAULT_VERSION yet.

https://github.com/llvm/llvm-project/pull/165718