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

Calculating dependencies ... done!
Dependency resolution took 1.53 s (backtrack: 0/20).

[ebuild     UD ] x11-misc/shared-mime-info-2.4-r2::gentoo [2.4-r3::gentoo] USE="-test" 6931 KiB

Total: 1 package (1 downgrade), Size of downloads: 6931 KiB