[PATCH 2/9] sha1_name.c: clarify what "fake" is for in find_short_object_filename()

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Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
 sha1_name.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/sha1_name.c b/sha1_name.c
index 5b0c845..4cbca34 100644
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -17,6 +17,13 @@ static int find_short_object_filename(int len, const char *name, unsigned char *
 	static struct alternate_object_database *fakeent;
 	if (!fakeent) {
+		/*
+		 * Create a "fake" alternate object database that
+		 * points to our own object database, to make it
+		 * easier to get a temporary working space in
+		 * alt->name/alt->base while iterating over the
+		 * object databases including our own.
+		 */
 		const char *objdir = get_object_directory();
 		int objdir_len = strlen(objdir);
 		int entlen = objdir_len + 43;

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