These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.06 s (backtrack: 0/20).

[ebuild  N     ] dev-util/diffball-1.0.1-r2::gentoo  USE="-debug" 89 KiB
[ebuild  N     ] app-arch/tarsync-0.2.3-r1::gentoo  21 KiB

Total: 2 packages (2 new), Size of downloads: 109 KiB