class Gem::Commands::ContentsCommand

def files_in_default_gem spec
  spec.files.map do |file|
    case file
    when /\A#{spec.bindir}\//
      [RbConfig::CONFIG['bindir'], $POSTMATCH]
    when /\.so\z/
      [RbConfig::CONFIG['archdir'], file]
    else
      [RbConfig::CONFIG['rubylibdir'], file]
    end
  end
end