Incorrect borg prune --stats output with --dry-run #4373
Description
With borg 1.1.7 on ubuntu 18.10:
borg prune <borg_dir> --dry-run --list --stats --keep-last 1
...
Original size Compressed size Deduplicated size
Deleted data: 0 B 0 B 0 B
All archives: 981.25 GB 793.40 GB 112.32 GB
Unique chunks Total chunks
Chunk index: 250054 2164226
borg prune <borg_dir> --list --stats --keep-last 1
...
Original size Compressed size Deduplicated size
Deleted data: -820.45 GB -669.72 GB -9.60 GB
All archives: 160.80 GB 123.69 GB 102.72 GB
Unique chunks Total chunks
Chunk index: 237044 371408
Pruning worked as I wanted it to, but the dry run stats do not give an accurate preview.