Verify confusables data is in NFD #1203
Description
Confusables tooling needs to check that input data is in NFD format and error/escape if not.
Related: https://github.com/unicode-org/properties/issues/459
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Confusables tooling needs to check that input data is in NFD format and error/escape if not.
Related: https://github.com/unicode-org/properties/issues/459