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

Calculating dependencies ... done!
Dependency resolution took 1.65 s (backtrack: 0/20).

[ebuild  N     ] dev-perl/File-Which-1.270.0-r1::gentoo  USE="-pwhich -test" PERL_FEATURES="ithreads (-debug) -quadmath" 25 KiB
[ebuild  N     ] dev-perl/UNIVERSAL-require-0.190.0::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 7 KiB
[ebuild  N     ] dev-perl/Inline-0.870.0::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 87 KiB
[ebuild  N     ] dev-perl/Algorithm-Diff-1.201.0::gentoo  USE="-examples" PERL_FEATURES="ithreads (-debug) -quadmath" 30 KiB
[ebuild  N     ] dev-perl/Text-Diff-1.450.0-r1::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 29 KiB
[ebuild  N     ] dev-perl/FileHandle-Unget-0.163.400-r1::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 42 KiB
[ebuild  N     ] dev-perl/Mail-Mbox-MessageParser-1.511.100::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 290 KiB
[ebuild  NS    ] app-text/docbook-xml-dtd-4.3-r2:4.3::gentoo [4.1.2-r7:4.1.2::gentoo, 4.2-r3:4.2::gentoo, 4.4-r3:4.4::gentoo, 4.5-r2:4.5::gentoo] 82 KiB
[ebuild  N     ] x11-misc/xdg-user-dirs-0.20::gentoo  USE="-gtk" 53 KiB
[ebuild  N     ] dev-perl/File-HomeDir-1.6.0-r1::gentoo  USE="xdg -test" PERL_FEATURES="ithreads (-debug) -quadmath" 36 KiB
[ebuild  N     ] net-mail/grepmail-5.3111::gentoo  USE="-test" PERL_FEATURES="ithreads (-debug) -quadmath" 548 KiB

Total: 11 packages (10 new, 1 in new slot), Size of downloads: 1224 KiB