old_contents: #  File:       prime_factors.py
  #  Purpose:    Compute the prime factors of a given natural number.
  #  Programmer: Amal Shehu
  #  Course:     Exercism
  #  Date:       Monday 26 September 2016, 12:05 AM
  
  
  def prime_factors(number, n=2, factors=None):
      if factors is None:
          factors = []
      for num in range(n, number):
          if (number % num) == 0:
              factors.append(num)
              return prime_factors(number // num, num, factors)
      else:
          return factors
  
new_contents: #  File:       prime_factors.py
  #  Purpose:    Compute the prime factors of a given natural number.
  #  Programmer: Amal Shehu
  #  Course:     Exercism
  #  Date:       Monday 26 September 2016, 12:05 AM
  
  
  def prime_factors(number):
          num = 2
          factors = []
          while num <= number:
              if (number % num) == 0:
                  number /= num
                  factors.append(num)
              else:
                  num += 1
  
          return factors
  
subject: Change if condition to while with reformat