Easter Eggs/Bugs Tutorial: Funny MS Windows Notepad Bug/Easter Egg

This is another funny bug with the Windows notepad (and notepad only). Some call this as "Easter Egg"

You can try the following steps:
1. Open Notepad
2. Type "this app can break" (without quotes) in the first line of the notepad without giving an enter
3. Save the file and close the notepad editor
4. Just double click to open the saved file

Now, you should some squares instead of the original text, is'nt it?. I dont know the reason why such features( may be to increase popularity ;-) ) are introduced in any windows apps.