Incorrect example for Add command

[Darylgolden]

When a user enters an add command with invalid format, the program prompts the user with the example Example: add n/John Doe p/98765432 e/[email protected] a/311, Clementi Ave 2, #02-25 t/friends t/owesMoney. This currently does not work as it is missing the notes field, but should be fixed by #98. Still, it is best for the example command to show all possible fields, so this would still be a feature flaw.