Merge branch 'ma/doc-pack-format-varint-for-sizes'

Doc update. * ma/doc-pack-format-varint-for-sizes: pack-format.txt: document sizes at start of delta data

Junio C Hamano committed Jan 15, 2021 at 15:20 UTC 16a8055daebdf95ca4bb97e3efe07e87f588767e

No changes.