Use Punic::isNumeric instead of non-existing isNumber (Fixes #3365)
Use Punic::isNumeric instead of non-existing isNumber (Fixes #3365)

Former-commit-id: 8daafc44d51f818c10c5c3048326761c182a0c8e
Former-commit-id: 03c55513bdca06f95760b270cd0c176349d5fd28
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