print possible values only once #382

Job	Run time
Lint	5m 33s
Test (windows-2022, x86_64-pc-windows-msvc)	28m 7s
Test (ubuntu-24.04, x86_64-unknown-linux-gnu)	15m 56s
Test (ubuntu-24.04, aarch64-linux-android, x86_64-unknown-linux-gnu)	7m 38s
cargo-deny	1m 0s
Test (macOS-latest, x86_64-apple-darwin)	11m 39s
test_success	4s
	1h 9m 57s

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