rustfmt #1554

Job	Run time
check	3m 8s
rustfmt	5s
audit	19s
clippy	3m 50s
test	4m 41s
cross-armv7	1m 26s
cross-aarch64	1m 28s
cross-mips	1m 28s
cross-mipsel	1m 22s
integration-test-five-nodes	13m 25s
integration-test-debts	17m 59s
integration-test-eth-payments	13m 47s
integration-test-althea-payment	16m 59s
integration-test-db-migration	12m 41s
integration-test-multi-exit	13m 37s
integration-test-validate-contract	12m 41s
	1h 58m 56s

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