`Int` - two's complement #1874

Job	Run time
build-benchmarks	32s
careful	1m 21s
clippy	19s
build (1.81.0, thumbv7em-none-eabi)	47s
build (1.81.0, wasm32-unknown-unknown)	40s
doc	34s
cross (aarch64-unknown-linux-gnu, stable)	2m 49s
minimal-versions	32s
build (stable, thumbv7em-none-eabi)	47s
cross (powerpc-unknown-linux-gnu, stable)	3m 19s
build (stable, wasm32-unknown-unknown)	41s
miri (x86_64-unknown-linux-gnu)	4m 9s
rustfmt	15s
miri (s390x-unknown-linux-gnu)	4m 27s
test (i686-unknown-linux-gnu, 1.81.0, sudo apt update && sudo apt install gcc-multilib)	2m 3s
test (i686-unknown-linux-gnu, stable, sudo apt update && sudo apt install gcc-multilib)	1m 56s
test (x86_64-unknown-linux-gnu, 1.81.0)	1m 34s
test (x86_64-unknown-linux-gnu, stable)	1m 36s
	28m 21s

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