Add test for `Debug` impl on `Array` (#207) #423

Job	Run time
careful	58s
clippy	23s
doc	22s
coverage	22s
miri (x86_64-unknown-linux-gnu)	51s
build (1.85.0, armv7a-none-eabi)	1m 26s
build (1.85.0, thumbv7em-none-eabi)	1m 22s
rustfmt	6s
test (stable)	39s
test (1.85.0)	53s
build (1.85.0, wasm32-unknown-unknown)	1m 27s
miri (s390x-unknown-linux-gnu)	1m 8s
build (stable, wasm32-unknown-unknown)	1m 7s
build (stable, thumbv7em-none-eabi)	1m 11s
build (stable, armv7a-none-eabi)	1m 12s
	13m 27s

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