maximbaz [1] filed a request to merge python-black [2] into black [3]:

`black` seems to have a better PKGBUILD, although according to
ArchWiki the final package should be named `python-black`, because
this tool is very coupled to python ecosystem (it formats python
code).

[1] https://aur.archlinux.org/account/maximbaz/
[2] https://aur.archlinux.org/pkgbase/python-black/
[3] https://aur.archlinux.org/pkgbase/black/