Traceback (most recent call last):
 File "formatter_example.py", line 85, in blank_lines
      79 | def blank_lines():
      80 |     a = [1, 2, 3]
      81 | 
      82 |     length = len(a)
      83 | 
      84 | 
-->   85 |     return a[length]
                      ^^^^^^^^^
IndexError: list index out of range
