[llvm] [llvm] format and terminate namespaces with closing comment (PR #94917)

[Aiden Grossman via llvm-commits]

https://github.com/boomanaiden154 approved this pull request.

LGTM. Thanks!

Sorry for taking up so much of your time in discussion on this. I'll try and make things more clear in the future.

https://github.com/llvm/llvm-project/pull/94917