old_contents: #! /usr/bin/env python3
  """A module defining fibonacci number related functions."""
  
  
  def fibonacci_numbers_below(n):
      """Return the list of fibonacci numbers smaller than 'n'.
  
      :param n: The limit of the generated number, so that result[-1] < n
      """
      a, b = 0, 1
      result = []
      while b < n:
          result.append(b)
          a, b = b, a + b
      return result
  
new_contents: #! /usr/bin/env python3
  """A module defining fibonacci number related functions."""
  
  
  def first_n_fibonacci_numbers(n):
      """Return the list of the first 'n' fibonacci numbers.
  
      :param n: The number of the fibonacci numbers, so that len(result) == n
      :return: The list of the first fibonacci numbers with length 'n'
      """
      result = []
      count = 0
      a, b = 0, 1
      while count < n:
          result.append(b)
          count += 1
          a, b = b, a + b
      return result
  
  
  def fibonacci_numbers_below(n):
      """Return the list of fibonacci numbers smaller than 'n'.
  
      :param n: The limit of the generated number, so that result[-1] < n
      """
      a, b = 0, 1
      result = []
      while b < n:
          result.append(b)
          a, b = b, a + b
      return result
  
subject: Add function for the first n fibonacci numbers