Calendar App info.plist

As a bit of a noob I have made a bit of a mess whilst reading the info.plist of the calendar app. After making a note of the bundle identifier to change the icon I seem to have edited the file rather than just closed it as the file is now empty and the icon has disappeared. Would a kind soul take pity on me and point me in the right direction to find or post what should be in the info.plist so I can get the app back.

Many thanks in advance

Sorted it.

If a Mod could delete this thread please