[clang] [clang-format] Fix assertion in alignChainedConditionals (PR #199112)

[via cfe-commits]

mygitljf wrote:

I have read the LLVM AI Tool Use Policy, Code-Review Policy and Practices, and Developer Policy.
I will strictly follow the human-in-the-loop approach. I will clearly disclose any AI-generated or AI-assisted content where applicable.
No AI-generated code or comments have been used in this PR.


https://github.com/llvm/llvm-project/pull/199112