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

Calculating dependencies ... done!
Dependency resolution took 1.55 s (backtrack: 0/20).

[ebuild     U  ] net-libs/libpsl-0.23.3::gentoo [0.21.5::gentoo] USE="idn -icu -static-libs -test" 7648 KiB

Total: 1 package (1 upgrade), Size of downloads: 7648 KiB