[PATCH] docs/git-gc: fix typo "--prune=all" to "--prune=now"

diff --git a/Documentation/git-gc.txt b/Documentation/git-gc.txt
index a7442499f6..a7c1b0f60e 100644
--- a/Documentation/git-gc.txt
+++ b/Documentation/git-gc.txt

@@ -76,7 +76,7 @@ be performed as well.
 --prune=<date>::
 	Prune loose objects older than date (default is 2 weeks ago,
 	overridable by the config variable `gc.pruneExpire`).
-	--prune=all prunes loose objects regardless of their age and
+	--prune=now prunes loose objects regardless of their age and
 	increases the risk of corruption if another process is writing to
 	the repository concurrently; see "NOTES" below. --prune is on by
 	default.

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Robert P. J. Day                                 Ottawa, Ontario, CANADA
                  http://crashcourse.ca/dokuwiki

Twitter:                                       http://twitter.com/rpjday
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