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

Calculating dependencies ... done!
Dependency resolution took 1.01 s (backtrack: 0/20).

[ebuild  N     ] app-vim/vim-misc-1.17.6::gentoo  56 KiB
[ebuild  N     ] app-vim/session-2.13.1-r1::gentoo  78 KiB

Total: 2 packages (2 new), Size of downloads: 134 KiB