Re: [PATCH v2 1/9] docs: update pack index v3 format

> diff --git a/Documentation/technical/hash-function-transition.adoc b/Documentation/technical/hash-function-transition.adoc
> index f047fd80ca..274dc993d4 100644
> --- a/Documentation/technical/hash-function-transition.adoc
> +++ b/Documentation/technical/hash-function-transition.adoc
> @@ -227,9 +227,9 @@ network byte order):
>      ** 4-byte length in bytes of shortened object names. This is the
>        shortest possible length needed to make names in the shortened
>        object name table unambiguous.
> -    ** 4-byte integer, recording where tables relating to this format
> +    ** 8-byte integer, recording where tables relating to this format
>        are stored in this index file, as an offset from the beginning.
> -  * 4-byte offset to the trailer from the beginning of this file.
> +  * 8-byte offset to the trailer from the beginning of this file.
>    * Zero or more additional key/value pairs (4-byte key, 4-byte
>      value). Only one key is supported: 'PSRC'. See the "Loose objects
>      and unreachable objects" section for supported values and how this
> @@ -276,10 +276,14 @@ network byte order):
>    up to and not including the table of CRC32 values.
>  - Zero or more NUL bytes.
>  - The trailer consists of the following:
> -  * A copy of the 20-byte SHA-256 checksum at the end of the
> +  * A copy of the full main hash checksum at the end of the
>      corresponding packfile.
> -  * 20-byte SHA-256 checksum of all of the above.
> +  * Full main hash checksum of all of the above.
> +
> +The "full main hash" is a full-length hash of the main (not compatibility)
> +algorithm in the repository.  Thus, if the main algorithm is SHA-256, this is
> +a 32-byte SHA-256 hash and for SHA-1, it's a 20-byte SHA-1 hash.