Merge branch 'ja/doc-markup-updates'

Documentation rules has been explicitly described how to mark-up literal parts and a few manual pages have been updated as examples. * ja/doc-markup-updates: doc: git-clone: do not autoreference the manpage in itself doc: git-clone: apply new documentation formatting guidelines doc: git-init: apply new documentation formatting guidelines doc: allow literal and emphasis format in doc vs help tests doc: rework CodingGuidelines with new formatting rules