Backup source of .x (No. 1)

• Backup list
• View the diff.
• View the diff current.
• View the diff for visual.
• View the backup.
• Go to .x.
  • 1 (2015-04-20 (Mon) 14:42:07)

- http://ja.wikipedia.org/wiki/.x

- https://msdn.microsoft.com/ja-jp/library/bb174837(v=vs.85).aspx