[libcxx-commits] [libcxx] [libc++][test] Adjust expected hexfloat format (PR #95011)

[David Tenty via libcxx-commits]

https://github.com/daltenty requested changes to this pull request.

I think the printf behaviour your seeing is invalid. The test sets a precision of zero, and  according to the C standard: 
```
the number of hexadecimal digits after ("the decimal point character") is equal to the precision; .. if the precision is zero and the # flag is not specified, no
decimal-point character appears."

https://github.com/llvm/llvm-project/pull/95011