[PATCH] git-prune-packed.txt: Fix reference to GIT_OBJECT_DIRECTORY

git-prune-packed operates on GIT_OBJECT_DIRECTORY.  See 'environment.c',

    git_object_dir = getenv(DB_ENVIRONMENT);

and cache.h,

    #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"

Signed-off-by: Steffen Prohaska <redacted>
---
 Documentation/git-prune-packed.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/git-prune-packed.txt b/Documentation/git-prune-packed.txt
index 80dc022..6738055 100644
--- a/Documentation/git-prune-packed.txt
+++ b/Documentation/git-prune-packed.txt

@@ -14,7 +14,7 @@ SYNOPSIS
 
 DESCRIPTION
 -----------
-This program searches the `$GIT_OBJECT_DIR` for all objects that currently
+This program searches the `$GIT_OBJECT_DIRECTORY` for all objects that currently
 exist in a pack file as well as the independent object directories.
 
 All such extra objects are removed.

-- 
1.8.4.477.gfa286b2