This is a beta release so that many people can test before this becomes the next stable release. All changes are documented in the changelog. Check especially the changes (marked with CHG) which might impact your workflow. Since the last beta, few things are worth testing and reporting issues:
- bash completion works for new and old CLI
- few fixes regarding Windows and one regression bug (see details in the changelog)
- the Windows wheel should now work properly
The installation procedure hasn't changed much and is available from the readme (beta packages might or might not be offered by the maintainers, in doubt install via pip install rdiff-backup==2.1.3b3 under Linux and use the attached binaries under Windows). You might want to use the side-by-side installation to safeguard your productive installation.
If no more issue is found, this will become the release candidate.