Add Black `--preview` support #2385

Job	Run time
build-wheel	8s
test (ubuntu-latest, 3.8)	41s
build-sdist-validate-dists	11s
test-nixos (ubuntu-latest)	1m 4s
test (ubuntu-latest, 3.9)	39s
test-nixos (macos-latest)	1m 51s
test (ubuntu-latest, 3.10)	36s
test (ubuntu-latest, 3.11)	32s
test (ubuntu-latest, 3.12)	34s
test (ubuntu-latest, 3.13-dev)	54s
test (windows-latest, 3.8)	2m 49s
test (windows-latest, 3.9)	2m 59s
test (windows-latest, 3.10)	3m 19s
test (windows-latest, 3.11)	2m 50s
test (windows-latest, 3.12)	3m 15s
test (macos-latest, 3.8)	1m 34s
test (macos-latest, 3.9)	57s
test (macos-latest, 3.10)	1m 0s
test (macos-latest, 3.11)	43s
test (macos-latest, 3.12)	49s
test (ubuntu-latest, 3.8, --constraint constraints-oldest.txt)	57s
test (ubuntu-latest, 3.12, pip uninstall -y -r constraints-future.txt ; pip install -r constraint...	42s
	29m 4s

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