Gem::Commands::CleanupCommand#get_candidate_gems

# File tmp/rubies/ruby-3.0.5/lib/rubygems/commands/cleanup_command.rb, line 118
def get_candidate_gems
  @candidate_gems = unless options[:args].empty?
                      options[:args].map do |gem_name|
                        Gem::Specification.find_all_by_name gem_name
                      end.flatten
                    else
                      Gem::Specification.to_a
                    end
end