basics on homotopy cofibers #3339

Job	Run time
nix	2m 18s
build (supported)	3m 24s
quick-build (supported, ubuntu-latest)	3m 21s
opam-build (supported, ubuntu-latest)	5m 16s
build (latest)	3m 22s
quick-build (latest, ubuntu-latest)	3m 13s
build (dev, --warnings)	2m 44s
opam-build (latest, ubuntu-latest)	4m 34s
quick-build (dev, ubuntu-latest)	2m 41s
opam-build (dev, ubuntu-latest)	3m 30s
doc-coqdoc	0s
coqchk	0s
doc-dep-graphs	0s
doc-alectryon	0s
doc-timing	0s
install	0s
deploy-doc	0s
delete-artifacts	4s
	34m 27s

Provide feedback