Token: removed test-only `stringifyList()` overload #17

Job	Run time
build (asan, -DANALYZE_ADDRESS=On, true, process, false)	16m 58s
build (tsan, -DANALYZE_THREAD=On, false, thread, false, --executor=thread --error-exitcode=0)	15m 12s
build (ubsan, -DANALYZE_UNDEFINED=On, true, process, true)	49m 58s
	1h 22m 8s

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