Merge branch 'pb/help-list-gitsubmodules-among-guides'

Help update. * pb/help-list-gitsubmodules-among-guides: help: add gitsubmodules to the list of guides

Junio C Hamano committed Dec 1, 2019 at 09:04 UTC ecbddd16bb2c725ad2305fd911bf237d845c862b

No changes.