Doc: mention --delta-base-offset is the default for Porcelain commands

The underlying pack-objects plumbing command still needs an explicit
option from the command line, but these days Porcelain passes the
option, so there is no need for end users to worry about it anymore.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Documentation/git-pack-objects.txt b/Documentation/git-pack-objects.txt
index a9c373c7b514fd01064dbf05557ddbfc04b3c1ee..96684bc51003485974424d1b00d060a7f8e5e59e 100644 (file)
--- a/Documentation/git-pack-objects.txt
+++ b/Documentation/git-pack-objects.txt
@@ -192,13 +192,18 @@ self-contained. Use `git index-pack --fix-thin`
 --delta-base-offset::
        A packed archive can express the base object of a delta as
        either a 20-byte object name or as an offset in the
-       stream, but older versions of git don't understand the
+       stream, but ancient versions of git don't understand the
        latter.  By default, 'git pack-objects' only uses the
        former format for better compatibility.  This option
        allows the command to use the latter format for
        compactness.  Depending on the average delta chain
        length, this option typically shrinks the resulting
        packfile by 3-5 per-cent.
++
+Note: Porcelain commands such as `git gc` (see linkgit:git-gc[1]),
+`git repack` (see linkgit:git-repack[1]) pass this option by default
+in modern git when they put objects in your repository into pack files.
+So does `git bundle` (see linkgit:git-bundle[1]) when it creates a bundle.
 
 --threads=<n>::
        Specifies the number of threads to spawn when searching for best