Smoke tests

`crystal tool format` #183

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Run time

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Job	Run time
aarch64-linux-android	11m 14s
aarch64-darwin	11m 55s
arm-linux-gnueabihf	12m 36s
i386-linux-gnu	11m 49s
i386-linux-musl	11m 40s
x86_64-dragonfly	11m 19s
x86_64-freebsd	11m 19s
x86_64-netbsd	11m 7s
x86_64-openbsd	11m 2s
	1h 44m 1s