Rework handling of assignment words (#176) #291

Job	Run time
apt-based	45s
docker-based (alpine, deploy-image)	6m 7s
nix-based (with-nixpkgs)	1m 22s
docker-based (archlinux)	5m 49s
nix-based (with-opam-nix)	1m 31s
nix-flake-checks	54s
docker-based (centos, no-tests)	4m 51s
docker-based (debian)	5m 39s
opam-based (ubuntu, 4.11.x)	8m 11s
docker-based (debian-testing)	5m 27s
opam-based (ubuntu, 4.11.x, lower-bounds, no-doc)	9m 12s
docker-based (debian-unstable)	5m 46s
opam-based (ubuntu, 4.12.x)	10m 38s
docker-based (fedora)	5m 51s
opam-based (ubuntu, 4.13.x)	8m 28s
docker-based (opensuse)	6m 5s
opam-based (ubuntu, 4.14.x, lower-bounds, no-doc)	9m 31s
docker-based (oraclelinux)	7m 23s
opam-based (ubuntu, 4.14.x, deploy-doc)	8m 4s
docker-based (ubuntu)	6m 29s
opam-based (ubuntu, 4.14.1, bytecode)	9m 52s
docker-based (ubuntu-lts)	5m 30s
opam-based (macos, 4.14.x)	14m 38s
opam-based (windows, 4.14.x, no-tests)	12m 51s
opam-based (ubuntu, 5.0.x)	9m 52s
	2h 50m 46s

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