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

Calculating dependencies ... done!
Dependency resolution took 1.57 s (backtrack: 0/20).

[ebuild     UD ] sys-apps/man-db-2.13.0-r1::gentoo [2.13.1-r1::gentoo] USE="manpager nls seccomp zlib (-selinux) -static-libs -verify-sig" 2023 KiB

Total: 1 package (1 downgrade), Size of downloads: 2023 KiB