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

Calculating dependencies ... done!
Dependency resolution took 1.00 s (backtrack: 0/20).

[ebuild  N     ] media-libs/libmpdclient-2.23-r1::gentoo  USE="-doc -examples -test" 70 KiB
[ebuild  N     ] media-sound/pms-0.42_p20170508-r1::gentoo  USE="regex -doc" 137 KiB

Total: 2 packages (2 new), Size of downloads: 207 KiB