Merge branch 'rd/gc-prune-doc-fix'

Doxfix. * rd/gc-prune-doc-fix: docs/git-gc: fix typo "--prune=all" to "--prune=now"

Junio C Hamano committed Mar 11, 2019 at 16:16 UTC 443442ec71f31eb39de03557c49ef2c972a98baa

No changes.