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

Calculating dependencies ... done!
Dependency resolution took 1.02 s (backtrack: 0/20).

[ebuild  N     ] dev-perl/IO-String-1.80.0-r3::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 8 KiB
[ebuild  N     ] dev-perl/IO-stringy-2.113.0::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 47 KiB
[ebuild  N     ] dev-perl/Config-IniFiles-3.1.0::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 70 KiB
[ebuild  N     ] dev-perl/YAML-1.310.0::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 87 KiB
[ebuild  N     ] dev-perl/Config-Auto-0.440.0-r1::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 17 KiB

Total: 5 packages (5 new), Size of downloads: 227 KiB