Merge branch 'mr/doc-clean-f-f'

Documentation update. * mr/doc-clean-f-f: Documentation/git-clean.txt: document that -f may need to be given twice

Junio C Hamano committed Mar 6, 2015 at 15:02 UTC 34e4e05b5169ad0b94176aef188e7f704a75bd93

No changes.