fun format(expiryDate: String, deleting: Boolean = false): String
Format the expiration date
example: previous input user input formatted
2 02/
0 8 08/
01/ 2 01/2
08/ <del> 0
08/2 <del> 08/
expiryDate - input expiration date
deleting - need to know if there has been a delete since format change based on it(check example above)
Return
expiry date formatted