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

Calculating dependencies  ....... done!
[ebuild  N     ] sys-apps/opentmpfiles-0.1.3::core-kit  USE="(-selinux)" 6 KiB
[ebuild  N     ] app-text/sgml-common-0.6.3-r5::core-kit  126 KiB
[ebuild  N     ] virtual/tmpfiles-1::core-kit  0 KiB
[ebuild  N     ] app-arch/unzip-6.0_p20::core-kit  USE="bzip2 unicode -natspec" 1361 KiB
[ebuild  N     ] app-text/docbook-dsssl-stylesheets-1.79-r2::text-kit  272 KiB
[ebuild  N     ] app-text/docbook-sgml-dtd-3.0-r3:3.0::text-kit  43 KiB
[ebuild  N     ] app-portage/elt-patches-20170317::core-kit  23 KiB
[ebuild  N     ] virtual/yacc-0::core-kit  0 KiB
[ebuild  N     ] virtual/awk-1::core-kit  0 KiB
[ebuild  N     ] virtual/perl-ExtUtils-MakeMaker-7.100.100_rc-r2::perl-kit  0 KiB
[ebuild  N     ] dev-util/gtk-doc-am-1.25-r1::core-kit  658 KiB
[ebuild  N     ] virtual/perl-Parse-CPAN-Meta-1.441.700-r2::perl-kit  0 KiB
[ebuild  N     ] virtual/perl-CPAN-Meta-YAML-0.18.0-r1::perl-kit  0 KiB
[ebuild  N     ] dev-perl/XML-Parser-2.440.0::perl-kit  232 KiB
[ebuild  N     ] virtual/perl-version-0.991.600-r1::perl-kit  0 KiB
[ebuild  N     ] virtual/perl-podlators-4.70.0-r1::perl-kit  0 KiB
[ebuild  N     ] virtual/perl-Text-ParseWords-3.300.0-r2::perl-kit  0 KiB
[ebuild  N     ] virtual/perl-Perl-OSType-1.9.0-r1::perl-kit  0 KiB
[ebuild  N     ] virtual/perl-Module-Metadata-1.0.31-r1::perl-kit  0 KiB
[ebuild  N     ] virtual/perl-Getopt-Long-2.480.0-r1::perl-kit  0 KiB
[ebuild  N     ] virtual/perl-ExtUtils-ParseXS-3.310.0-r1::perl-kit  0 KiB
[ebuild  N     ] virtual/perl-ExtUtils-Manifest-1.700.0-r3::perl-kit  0 KiB
[ebuild  N     ] virtual/perl-ExtUtils-Install-2.40.0-r2::perl-kit  0 KiB
[ebuild  N     ] virtual/perl-ExtUtils-CBuilder-0.280.225-r1::perl-kit  0 KiB
[ebuild  N     ] virtual/perl-JSON-PP-2.273.0-r4::perl-kit  0 KiB
[ebuild  N     ] virtual/perl-CPAN-Meta-2.150.5-r1::perl-kit  0 KiB
[ebuild  N     ] dev-perl/Module-Build-0.421.800::perl-kit  USE="{-test}" 299 KiB
[ebuild  N     ] dev-libs/libxslt-1.1.30-r1::core-kit  USE="crypt python -debug -examples -static-libs" PYTHON_TARGETS="python2_7" 3364 KiB
[ebuild  N     ] dev-util/itstool-2.0.2::core-kit  PYTHON_TARGETS="python2_7" 95 KiB
[ebuild  N     ] dev-util/intltool-0.51.0-r1::core-kit  159 KiB
[ebuild  N     ] dev-perl/Locale-gettext-1.70.0::perl-kit  9 KiB
[ebuild  N     ] sys-apps/help2man-1.47.4::core-kit  USE="nls" 186 KiB
[ebuild  NS    ] sys-devel/automake-1.14.1-r1:1.14::core-kit [1.15-r2:1.15::core-kit] 1455 KiB
[ebuild  N     ] app-text/build-docbook-catalog-1.21::core-kit  5 KiB
[ebuild  N     ] app-text/docbook-xsl-stylesheets-1.79.1-r2::core-kit  USE="-ruby" 21454 KiB
[ebuild  N     ] app-text/docbook-xml-dtd-4.3-r1:4.3::core-kit  82 KiB
[ebuild  N     ] app-text/docbook-xml-dtd-4.1.2-r6:4.1.2::core-kit  74 KiB
[ebuild  N     ] dev-util/desktop-file-utils-0.23::dev-kit  USE="-emacs" 129 KiB
[ebuild  N     ] gnome-extra/yelp-xsl-3.20.1::gnome-kit  556 KiB
[ebuild  N     ] app-text/yelp-tools-3.18.0::gnome-kit  206 KiB
[ebuild  N     ] dev-util/gtk-doc-1.25-r1::gnome-kit  USE="-debug -doc -emacs -highlight -vim" PYTHON_TARGETS="python2_7" 0 KiB
[ebuild     U  ] sys-apps/openrc-0.35.0_beta1::core-kit [0.23.2-r1::core-kit] USE="ncurses pam unicode -audit -debug -netifrc -newnet (-prefix) (-selinux) -static-libs (-tools%)" 0 KiB

Total: 42 packages (1 upgrade, 40 new, 1 in new slot), Size of downloads: 30784 KiB