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

Calculating dependencies ... done!
Dependency resolution took 0.98 s (backtrack: 0/20).

[ebuild  N     ] x11-libs/libXScrnSaver-1.2.5::gentoo  USE="-doc" 266 KiB
[ebuild  N     ] x11-misc/xprintidle-2.1::gentoo  91 KiB

Total: 2 packages (2 new), Size of downloads: 356 KiB