Gem::Commands::ExecCommand#activate!

# File tmp/rubies/ruby-4.0.0/lib/rubygems/commands/exec_command.rb, line 187
def activate!
  gem(options[:gem_name], options[:version])
  Gem.finish_resolve

  verbose "activated #{options[:gem_name]} (#{Gem.loaded_specs[options[:gem_name]].version})"
end