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

Calculating dependencies ... done!
Dependency resolution took 1.52 s (backtrack: 0/20).

[ebuild     U  ] sys-apps/gawk-5.4.1-r1::gentoo [5.4.0-r2::gentoo] USE="mpfr nls readline -pma -verify-sig" 3749 KiB

Total: 1 package (1 upgrade), Size of downloads: 3749 KiB