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

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

[ebuild  N     ] media-libs/libass-0.17.5:0/9::gentoo  USE="fontconfig -libunibreak -test -verify-sig" 450 KiB

Total: 1 package (1 new), Size of downloads: 450 KiB