Format takes in a string and an int and returns the string
left-padded with spaces to the length of the int. If the
string is already longer than the specified length, the
original string is returned.
FormatRune takes in a string, an int, and a rune and returns the string
left-padded with the specifed rune to the length of the int. If the
string is already longer than the specified length, the
original string is returned.