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

Calculating dependencies ... done!
Dependency resolution took 1.49 s (backtrack: 0/20).

[ebuild     U  ] perl-core/File-Temp-0.231.200::gentoo [0.231.100-r1::gentoo] USE="-test%" PERL_FEATURES="ithreads (-debug) -quadmath" 76 KiB
[ebuild     U  ] virtual/perl-File-Temp-0.231.200::gentoo [0.231.100-r1::gentoo] 0 KiB

Total: 2 packages (2 upgrades), Size of downloads: 76 KiB