[libcxx-commits] [libcxx] [libcxx][algorithm] Optimize std::stable_sort via radix sort algorithm (PR #104683)

[Дмитрий Изволов via libcxx-commits]

izvolov wrote:

> Should code in `stable_sort.pass.cpp` be reformatted , or maybe ignored using `// clang-format off`?

Nearby tests are _almost_ formatted correctly, so I reformatted the test.

https://github.com/llvm/llvm-project/pull/104683