Fix string UTF-8 misformatting PANIC #114
Merged
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This PR fixes the PANIC observed in Issue #113. Apparently the bytes generated from the tokens can potentially be invalid, in which case we return an empty string. This introduces no functional changes other than getting rid of the reported PANIC.
The exact position this warning was throwed is line 40 in
ModelAPIs.lean
. The ultimate cause is inByT5.lean
that we modify in this PR.