Merge branch 'jc/fix-first-object-walk'

Doc update. * jc/fix-first-object-walk: docs: add headers in MyFirstObjectWalk docs: fix places that break compilation in MyFirstObjectWalk

Junio C Hamano committed Dec 10, 2021 at 14:35 UTC 3d2dce168f1c004e746d18d0b2dfc55bc8af455a

No changes.