cmpv2

der: followup to docs changes (#2233) #2871

Job	Run time
test (stable)	7m 7s
build (stable, wasm32-unknown-unknown)	48s
build (1.85.0, thumbv7em-none-eabi)	50s
test (1.85.0)	7m 18s
build (1.85.0, wasm32-unknown-unknown)	52s
build (stable, thumbv7em-none-eabi)	50s
minimal-versions	0s
	17m 45s

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