[PATCH 07/30] chunk-format: number of chunks is optional

["Derrick Stolee via GitGitGadget" <gitgitgadget@gmail.com>]

From: Derrick Stolee <derrickstolee@github.com>

Even though the commit-graph and multi-pack-index file formats specify a
number of chunks in their header information, this is optional. The
table of contents terminates with a null chunk ID, which can be used
instead. The extra value is helpful for some checks, but is ultimately
not necessary for the format.

This will be important in some future formats.

Signed-off-by: Derrick Stolee <derrickstolee@github.com>
---
 Documentation/gitformat-chunk.txt | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Documentation/gitformat-chunk.txt b/Documentation/gitformat-chunk.txt
index 57202ede273..c01f5567c4f 100644
--- a/Documentation/gitformat-chunk.txt
+++ b/Documentation/gitformat-chunk.txt
@@ -24,8 +24,9 @@ how they use the chunks to describe structured data.
 
 A chunk-based file format begins with some header information custom to
 that format. That header should include enough information to identify
-the file type, format version, and number of chunks in the file. From this
-information, that file can determine the start of the chunk-based region.
+the file type, format version, and (optionally) the number of chunks in
+the file. From this information, that file can determine the start of the
+chunk-based region.
 
 The chunk-based region starts with a table of contents describing where
 each chunk starts and ends. This consists of (C+1) rows of 12 bytes each,
-- 
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