Commutators, commutator subgroups and three subgroups lemma #3258

Job	Run time
nix	2m 22s
quick-build (supported, ubuntu-latest)	2m 54s
opam-build (supported, ubuntu-latest)	2m 52s
quick-build (latest, ubuntu-latest)	2m 53s
build (supported)	2m 54s
opam-build (latest, ubuntu-latest)	2m 52s
quick-build (dev, ubuntu-latest)	2m 54s
build (latest)	2m 55s
opam-build (dev, ubuntu-latest)	2m 53s
build (dev, --warnings)	2m 54s
doc-dep-graphs	1s
doc-coqdoc	1s
doc-alectryon	1s
coqchk	1s
doc-timing	1s
install	1s
deploy-doc	1s
delete-artifacts	3s
	28m 33s

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