tree a4797fe49eb37219db007e51d966ef4aa4bebada
parent 13962bf49cc756b49d9f114baf454f428a18acac
author olaola <olaola@google.com> 1518111533 -0800
committer Copybara-Service <copybara-piper@google.com> 1518111636 -0800

User-friendlier representation of a missing digest.

I moved it into DigestUtil preemptively in case we switch to binary instead of hex representation.

TESTED=manually
RELNOTES: None
PiperOrigin-RevId: 185007558