Change number to odd

Define a function make_number_odd that receives a number, adds 1 to that
number if it is even, and returns the number.

If the original number passed is odd, just return it.

Hint: Use the % operator to determine if even or odd


>>> make_number_odd(2)
>>> make_number_odd(5)
import unittest

class MakeNumberOddTestCase(unittest.TestCase):

    def test_even_number(self):
        self.assertEqual(make_number_odd(2), 3)

    def test_odd_number(self):
        self.assertEqual(make_number_odd(5), 5)