julia

b7aa5e37 - simplify complex atanh and remove singularity perturbation (#55268)

simplify complex atanh and remove singularity perturbation (#55268) fixes https://github.com/JuliaLang/julia/issues/55266, and use `inv(z)` rather than `1/z` and use `muladd` in a couple places. --------- Co-authored-by: Mosè Giordano <giordano@users.noreply.github.com>