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

Calculating dependencies ... done!
Dependency resolution took 0.98 s (backtrack: 0/20).

[ebuild  N     ] dev-perl/Tk-804.36.0-r5::gentoo  USE="-examples -test" PERL_FEATURES="ithreads (-debug) -quadmath" 6861 KiB
[ebuild  N     ] x11-misc/mgm-1.2-r2::gentoo  885 KiB

Total: 2 packages (2 new), Size of downloads: 7745 KiB