Merge branch 'hv/doc-commit-reference-style'

A small doc update. * hv/doc-commit-reference-style: SubmittingPatches: use gitk's "Copy commit summary" format

Junio C Hamano committed Sep 8, 2016 at 21:49 UTC d012326d489e29777ac457c3017d8b46f6546d24

No changes.