Merge branch 'jk/doc-diff-parallel' into maint

Update to doc-diff. * jk/doc-diff-parallel: doc-diff: use single-colon rule in rendering Makefile

Junio C Hamano committed Mar 17, 2020 at 15:02 UTC 56f97d5896a964e88d46b227302e682a75837314

No changes.