fixed a formatter bug causing invalid json through adding trailing co… #1218

Job	Run time
data-test (3.10)	25s
data-test (3.11)	23s
data-test (3.12)	27s
data-build / build	3m 6s
data-deployment-1 / Restart the deployment	6s
data-deployment-2 / Restart the deployment	7s
	4m 34s

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