Merge branch 'jc/how-to-document-api' into maint

Doc update. * jc/how-to-document-api: CodingGuidelines: document the API in *.h files

Junio C Hamano committed Nov 21, 2018 at 22:58 UTC 6b57374d3e618c856fd69795919aa7ea191ec0c9

No changes.