[clang-tools-extra] [clang-tidy] Avoid brace fix-it crash in macro body expansion (PR #198788)

[Zeyi Xu via cfe-commits]

zeyi2 wrote:

localspook seems to be away for now (2weeks since last review). So I'd like to merge the PR first, if anything unexpected happens, I'll revert it and apply another fix. WDYT @vbvictor 

https://github.com/llvm/llvm-project/pull/198788