README: -tabwidth was removed from goimports
README: -tabwidth was removed from goimports

CodyGuo/elvish,elves/elvish,elves/elvish,elves/elvish,ke7ofi/elvish,elves/elvish,beni55/elvish,ke7ofi/elvish,beni55/elvish,CodyGuo/elvish,elves/elvish