multichromosome revisions #1257

Job	Run time
tests-Windows-CLI (mingw64, x86_64, 3.8)	16m 15s
tests-Windows-CLI (ucrt64, ucrt-x86_64, 3.8)	15m 55s
canceller	4s
tests-Unix-CLI (ubuntu-20.04, 7, 3.8)	5m 39s
tests-Unix-CLI (ubuntu-20.04, 11, 3.9)	5m 57s
tests-Unix-GUI (ubuntu-20.04, 5.9.5, 7)	5m 9s
tests-Unix-CLI (macos-12, 3.8)	7m 5s
tests-Windows-GUI (mingw64, x86_64)	12m 21s
tests-Unix-GUI (ubuntu-20.04, 5.15.2, 11)	6m 2s
tests-Windows-GUI (ucrt64, ucrt-x86_64)	12m 16s
tests-Unix-CLI (macos-13, 3.9)	8m 0s
tests-Unix-GUI (ubuntu-22.04, 5.15.2, 12)	6m 11s
tests-Unix-GUI (ubuntu-22.04, 6.7.2, 12)	7m 5s
tests-Unix-GUI (macos-12, 5.9.5)	8m 6s
tests-windows-latest-pacman (mingw64, x86_64)	1m 51s
tests-Unix-GUI (macos-13, 5.15.2)	6m 28s
tests-windows-latest-pacman (ucrt64, ucrt-x86_64)	1m 37s
tests-Unix-GUI (macos-13, 6.7.2)	14m 25s
	2h 20m 26s

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