Gem::Commands::CleanupCommand#get_candidate_gems

# File tmp/rubies/ruby-3.1.3/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