Better Debug impl for UnvalidatedTinyAsciiStr (#4189) #1208

Job	Run time
Check Credentials for jobs that need JSON credentials	3s
WASM Demo	8m 1s
bench-binsize	7m 37s
bench-datasize	17m 42s
bench-memory (macos-latest)	16m 34s
bench-memory (ubuntu-latest)	11m 50s
bench-memory (windows-latest)	15m 35s
bench-perf (components/collections)	6m 7s
bench-perf (components/datetime)	5m 13s
bench-perf (components/locid)	7m 23s
bench-perf (components/locid_transform)	3m 30s
bench-perf (components/plurals)	8m 14s
bench-perf (components/segmenter)	5m 2s
bench-perf (experimental/transliterate)	3m 48s
bench-perf (experimental/zerotrie)	6m 50s
bench-perf (utils/fixed_decimal)	4m 42s
bench-perf (utils/litemap)	2m 59s
bench-perf (utils/tinystr)	8m 11s
bench-perf (utils/writeable)	3m 38s
bench-perf (utils/zerovec)	10m 49s
Docs Preview	5m 1s
FFI Preview	54s
Deploy to GitHub Pages	8m 12s
	2h 47m 55s

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