[clang-tools-extra] [clang-tidy] Fix invalid fixit from modernize-use-ranges for nullptr used with std::unique_ptr (PR #127162)

[Congcong Cai via cfe-commits]

HerrCai0907 wrote:

Thanks for you contributions!

Some tips: 
1. run git-clang-format -f before commit change
2. actually you don't need to rebase often. but in past several weeks we have a major release and it causes release notes are cleared. in this case, rebase is needed.
3. After several successfully land, you can request write access. then you can merge it by yourself.

https://github.com/llvm/llvm-project/pull/127162