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

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

[ebuild  N     ] dev-tcltk/tclreadline-2.4.1::gentoo  USE="-tk" 261 KiB

Total: 1 package (1 new), Size of downloads: 261 KiB