The following USE changes are necessary to proceed:
 (see "package.use" in the portage(5) man page for more details)
# required by dev-lang/ruby-2.5.0-r1::gentoo
# required by dev-ruby/minitest-5.11.3::gentoo[ruby_targets_ruby25]
>=dev-ruby/power_assert-1.1.1 ruby_targets_ruby25
# required by dev-lang/ruby-2.5.0-r1::gentoo
# required by dev-ruby/minitest-5.11.3::gentoo[ruby_targets_ruby25]
>=dev-ruby/rake-12.3.0 ruby_targets_ruby25
# required by dev-ruby/rake-12.3.0::gentoo[-test,ruby_targets_ruby25]
# required by dev-lang/ruby-2.5.0-r1::gentoo
# required by dev-ruby/minitest-5.11.3::gentoo[ruby_targets_ruby25]
>=virtual/rubygems-14 ruby_targets_ruby25
# required by dev-lang/ruby-2.5.0-r1::gentoo
# required by dev-ruby/minitest-5.11.3::gentoo[ruby_targets_ruby25]
>=dev-ruby/json-2.1.0 ruby_targets_ruby25
# required by dev-lang/ruby-2.5.0-r1::gentoo
# required by dev-ruby/minitest-5.11.3::gentoo[ruby_targets_ruby25]
>=dev-ruby/test-unit-3.2.7 ruby_targets_ruby25
# required by virtual/rubygems-14::gentoo[ruby_targets_ruby25]
# required by dev-ruby/minitest-5.11.3::gentoo[-test,ruby_targets_ruby25]
# required by dev-lang/ruby-2.5.0-r1::gentoo
# required by dev-ruby/racc-1.4.14::gentoo[ruby_targets_ruby25]
# required by dev-ruby/rdoc-6.0.1::gentoo[ruby_targets_ruby25]
>=dev-ruby/rubygems-2.7.4 ruby_targets_ruby25
# required by dev-lang/ruby-2.5.0-r1::gentoo
# required by dev-ruby/minitest-5.11.3::gentoo[ruby_targets_ruby25]
>=dev-ruby/did_you_mean-1.2.0 ruby_targets_ruby25
# required by dev-lang/ruby-2.5.0-r1::gentoo
# required by dev-ruby/minitest-5.11.3::gentoo[ruby_targets_ruby25]
>=dev-ruby/xmlrpc-0.3.0 ruby_targets_ruby25
# required by dev-lang/ruby-2.5.0-r1::gentoo[rdoc]
# required by dev-ruby/minitest-5.11.3::gentoo[ruby_targets_ruby25]
>=dev-ruby/rdoc-6.0.1 ruby_targets_ruby25
# required by dev-lang/ruby-2.5.0-r1::gentoo
# required by dev-ruby/minitest-5.11.3::gentoo[ruby_targets_ruby25]
>=dev-ruby/net-telnet-0.1.1-r1 ruby_targets_ruby25
# required by dev-ruby/rdoc-6.0.1::gentoo[ruby_targets_ruby25]
# required by dev-lang/ruby-2.5.0-r1::gentoo[rdoc]
# required by dev-ruby/minitest-5.11.3::gentoo[ruby_targets_ruby25]
>=dev-ruby/racc-1.4.14 ruby_targets_ruby25
# required by dev-ruby/rdoc-6.0.1::gentoo[ruby_targets_ruby25]
# required by dev-lang/ruby-2.5.0-r1::gentoo[rdoc]
# required by dev-ruby/minitest-5.11.3::gentoo[ruby_targets_ruby25]
>=dev-ruby/kpeg-1.1.0 ruby_targets_ruby25
# required by dev-lang/ruby-2.5.0-r1::gentoo
# required by dev-ruby/racc-1.4.14::gentoo[ruby_targets_ruby25]
# required by dev-ruby/rdoc-6.0.1::gentoo[ruby_targets_ruby25]
>=dev-ruby/minitest-5.11.3 ruby_targets_ruby25