Merge branch 'sb/clone-recursive-submodule-doc'

Doc update. * sb/clone-recursive-submodule-doc: Documentation/git-clone: improve description for submodule recursing

Junio C Hamano committed Dec 19, 2017 at 11:33 UTC a328b2cb63c39b9df9bdc08d27ee29d80fcd768c

No changes.