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-rw-r--r--Documentation/git-index-pack.txt11
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diff --git a/Documentation/git-index-pack.txt b/Documentation/git-index-pack.txt
index 1235416e0..2229ee86b 100644
--- a/Documentation/git-index-pack.txt
+++ b/Documentation/git-index-pack.txt
@@ -69,6 +69,17 @@ OPTIONS
locate any which have outlived their usefulness.
+Note
+----
+
+Once the index has been created, the list of object names is sorted
+and the SHA1 hash of that list is printed to stdout. If --stdin was
+also used then this is prefixed by either "pack\t", or "keep\t" if a
+new .keep file was successfully created. This is useful to remove a
+.keep file used as a lock to prevent the race with gitlink:git-repack[1]
+mentioned above.
+
+
Author
------
Written by Sergey Vlasov <vsu@altlinux.ru>