i have read somewhere that this happens because notepad considers the format of file before saving it.
It gets the format from first few bytes of data.
If they are in fix pattern, then it will be saved in some different format.
The pattern here is 4 3 3 4
Bush hid the facts
But i tried a different sentence and it didn't work.
i tried "This api may halt" (without quotes) and after saving and reopening it didn't change into weird things.
hope someone tells the solution