fix validate_format #263

Job	Run time
build	5m 32s
initial-cleanup	33s
generate-initial-collection-json / run	38s
test-stage / run	42s
test-publish / run	43s
test-generate-collection-json / run	36s
test-generate-collection-staged-json / run	37s
test-backup / run	1m 8s
	10m 29s

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