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

Calculating dependencies ... done!
Dependency resolution took 1.02 s (backtrack: 0/20).

[ebuild  N     ] dev-libs/libptytty-2.0-r1::gentoo  45 KiB
[ebuild  N     ] x11-terms/rxvt-unicode-9.31-r3::gentoo  USE="font-styles mousewheel -24-bit-color -256-color -blink -fading-colors -gdk-pixbuf -iso14755 -perl -startup-notification -unicode3 -wide-glyphs -xft" 868 KiB

Total: 2 packages (2 new), Size of downloads: 912 KiB