sec1

der: add `Reader::peek_into` (#1478) #3049

Job	Run time
build (1.72.0, thumbv7em-none-eabi)	35s
test (1.72.0)	1m 16s
build (1.72.0, wasm32-unknown-unknown)	5m 45s
minimal-versions	0s
test (stable)	1m 16s
build (stable, thumbv7em-none-eabi)	28s
build (stable, wasm32-unknown-unknown)	33s
	9m 53s

Provide feedback