[libcxx-commits] [libcxx] [libc++][NFC] Centralize test for support of == and != in ranges (PR #78481)

[Will Hawkins via libcxx-commits]

hawkinsw wrote:

Hope that this is helpful! Let me know if there is anything I can do to improve it! cc @var-const @cjdb 

https://github.com/llvm/llvm-project/pull/78481