setup.c: detect $GIT_COMMON_DIR in is_git_directory()

diff --git a/Documentation/git-prune-packed.txt b/Documentation/git-prune-packed.txt
index 80dc022edea58b76aeea2f7df0876fd98bc6dc05..9fed59a31724c4dccd7364c03c32c72d9c8d4664 100644 (file)
--- a/Documentation/git-prune-packed.txt
+++ b/Documentation/git-prune-packed.txt
@@ -1,5 +1,5 @@
 git-prune-packed(1)
-=====================
+===================
 
 NAME
 ----
@@ -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.