Hide internals of values #896

Job	Run time
runefmt	1m 46s
docs	1m 17s
clippy	1m 25s
rustfmt	5s
basics	1s
msrv	1m 8s
no_default_features	43s
miri_rune_alloc	1m 10s
miri_rune	1m 9s
no_std_minimal	56s
build_feature (capture-io)	42s
build_feature (cli,doc)	1m 10s
wasm	47s
build_feature (cli,fmt)	1m 7s
build_feature (cli)	1m 10s
build_feature (workspace)	46s
build_feature (languageserver)	1m 6s
build_feature (byte-code)	51s
test	1s
	17m 20s

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