class Gem::Doctor

def doctor_child(sub_directory, extension) # :nodoc:
  directory = File.join(@gem_repository, sub_directory)
  Dir.entries(directory).sort.each do |ent|
    next if [".", ".."].include?(ent)
    child = File.join(directory, ent)
    next unless File.exist?(child)
    basename = File.basename(child, extension)
    next if installed_specs.include? basename
    next if /^rubygems-\d/.match?(basename)
    next if sub_directory == "specifications" && basename == "default"
    next if sub_directory == "plugins" && Gem.plugin_suffix_regexp =~ (basename)
    type = File.directory?(child) ? "directory" : "file"
    action = if @dry_run
      "Extra"
    else
      FileUtils.rm_r(child)
      "Removed"
    end
    say "#{action} #{type} #{sub_directory}/#{File.basename(child)}"
  end
rescue Errno::ENOENT
  # ignore
end