refactor: comment + call this.finish() #769

Job	Run time
test (18, base)	52s
lint	56s
test-cli (18)	3m 45s
test (18, core)	1m 1s
test-e2e	45s
test-cli (20)	4m 20s
test (18, cube)	1m 26s
test (18, csvw)	53s
test (18, formats)	56s
type-check	1m 52s
ensure-manifests	47s
test (18, ftp)	53s
global-installation (ubuntu-latest, 20)	2m 19s
test (18, graph-store)	1m 10s
global-installation (macos-latest, 20)	2m 47s
smoke-test-cli (ubuntu-latest, 20)	1m 7s
test (18, http)	48s
global-installation (windows-latest, 20.12.1)	9m 36s
smoke-test-cli (macos-latest, 20)	1m 4s
test (18, rdf)	52s
smoke-test-cli (windows-latest, 20.12.1)	5m 18s
test (18, s3)	52s
test (18, sparql)	50s
test (18, shacl)	51s
test (18, validation)	1m 52s
test (20, base)	51s
test (20, core)	54s
test (20, cube)	1m 24s
test (20, csvw)	50s
test (20, formats)	1m 0s
test (20, ftp)	1m 4s
test (20, graph-store)	1m 13s
test (20, http)	47s
test (20, rdf)	45s
test (20, s3)	47s
test (20, sparql)	51s
test (20, shacl)	50s
test (20, validation)	1m 37s
	1h 0m 45s

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