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

Calculating dependencies ... done!
Dependency resolution took 1.55 s (backtrack: 0/20).

[ebuild  NS    ] dev-lang/lua-5.1.5-r200:5.1::gentoo [5.4.8:5.4::gentoo] USE="deprecated readline" 389 KiB
[ebuild  N     ] dev-lua/luafilesystem-1.9.0::gentoo  USE="-test" LUA_TARGETS="lua5-1 -lua5-3 -lua5-4 -luajit" 29 KiB
[ebuild  N     ] dev-lua/say-1.4.1::gentoo  USE="-test" LUA_TARGETS="lua5-1 -lua5-3 -lua5-4 -luajit" 6 KiB
[ebuild  N     ] dev-lua/lua_cliargs-3.0.2::gentoo  USE="-examples" LUA_TARGETS="lua5-1 -lua5-3 -lua5-4 -luajit" 31 KiB
[ebuild  N     ] dev-lua/luasystem-0.7.1::gentoo  USE="-test" LUA_TARGETS="lua5-1 -lua5-3 -lua5-4 -luajit" 85 KiB
[ebuild  N     ] dev-lua/dkjson-2.11::gentoo  USE="-test" LUA_TARGETS="lua5-1 -lua5-3 -lua5-4 -luajit" 19 KiB
[ebuild  N     ] dev-lua/lua-term-0.8::gentoo  LUA_TARGETS="lua5-1 -lua5-3 -lua5-4 -luajit" 5 KiB
[ebuild  N     ] dev-lua/mediator_lua-1.1.2_p0-r1::gentoo  USE="-test" LUA_TARGETS="lua5-1 -lua5-3 -lua5-4 -luajit" 6 KiB
[ebuild  N     ] dev-lua/luassert-1.9.0::gentoo  USE="-test" LUA_TARGETS="lua5-1 -lua5-3 -lua5-4 -luajit" 42 KiB
[ebuild  N     ] dev-lua/penlight-1.15.0::gentoo  USE="-test" LUA_TARGETS="lua5-1 -lua5-3 -lua5-4 -luajit" 431 KiB
[ebuild  N     ] dev-lua/busted-2.3.0::gentoo  USE="-test" LUA_TARGETS="lua5-1 -lua5-3 -lua5-4 -luajit" 66 KiB
[ebuild  N     ] dev-lua/busted-htest-1.0.0-r1::gentoo  LUA_TARGETS="lua5-1 -lua5-3 -lua5-4 -luajit" 5 KiB

Total: 12 packages (11 new, 1 in new slot), Size of downloads: 1109 KiB