Display value for all childless nodes during `info` #2763

Job	Run time
jsonschema	0s
core / Load tox environments	5s
asdf-schemas / Load tox environments	7s
core / Python 3.11 coverage	1m 24s
core / Python 3.10 coverage	1m 23s
core / Python 3.9 coverage	1m 24s
asdf-schemas / asdf-standard (ubuntu-latest)	50s
asdf-schemas / asdf-transform-schemas (ubuntu-latest)	1m 9s
asdf-schemas / asdf-unit-schemas (ubuntu-latest)	35s
test	1s
oldest	1s
dev	1s
compatibility	1s
package	1s
	7m 2s

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