old_contents: # Given 2 strings, a and b, return a string of the form short+long+short,
  # with the shorter string on the outside and the longer string on the inside.
  # The strings will not be the same length, but they may be empty (length 0). 
  
  # combo_string('Hello', 'hi') → 'hiHellohi'
  # combo_string('hi', 'Hello') → 'hiHellohi'
  # combo_string('aaa', 'b') → 'baaab'
  
  def combo_string(a, b):
    if len(a) < len(b):
        return a + b + a
    else:
        return b + a + b
  
  print(combo_string('Hello', 'hi'))
  print(combo_string('hi', 'Hello'))
  print(combo_string('aaa', 'b'))
  
new_contents: # Given 2 strings, a and b, return a string of the form short+long+short,
  # with the shorter string on the outside and the longer string on the inside.
  # The strings will not be the same length, but they may be empty (length 0). 
  
  # combo_string('Hello', 'hi') --> 'hiHellohi'
  # combo_string('hi', 'Hello') --> 'hiHellohi'
  # combo_string('aaa', 'b') --> 'baaab'
  
  def combo_string(a, b):
    if len(a) < len(b):
        return a + b + a
    else:
        return b + a + b
  
  print(combo_string('Hello', 'hi'))
  print(combo_string('hi', 'Hello'))
  print(combo_string('aaa', 'b'))
  
subject: Update combo_string.py