[clang] clang-format: Allow open brace with trailing comment (no line break) (PR #89956)

[via cfe-commits]

GertyP wrote:

Ping
... and tweaking the title formatting to use square braces in case it's important:  Can someone tell me if it makes a difference to have `[clang-format] ...` in title over `clang-format: ...`?  I haven't seen anything saying so in any readme but I could have missed something.

https://github.com/llvm/llvm-project/pull/89956