[HexDecOctBin]

Is there an archive format that supports appending diff's of an existing file, so that multiple versions of the same file are stored? PKZIP has a proprietary extension (supposedly), but I couldn't find any open version of that.

(I was thinking of a creating a version control system whose .git directory equivalent is basically an archive file that can easily be emailed, etc.)

[pizza]

New versions of zstd allow you to produce patches using the trained dictionary feature