The previous comment claimed 'some rippers emit the literal [Unknown
Artist] string' — no such tagger is actually known. The defensive
second clause in the missing-albumartist check was preserving
accidental behavior from the prior parseArtists implementation, not
guarding against a documented real-world case. Rewrite the comment
to be honest about provenance: keep the clause for behavioral parity
and the cheap round-trip defense, but stop asserting facts I can't
back up.
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