pprint not only adds indentation, but also increases right margin for nested items.

>>> pprint.pprint([' '.join(str(i) for i in range(30))]*2)
['0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 '
 '28 29',
 '0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 '
 '28 29']
>>> pprint.pprint([[[[[[[[[[[[' '.join(str(i) for i in range(30))]]]]]]]]]]]]*2)
[[[[[[[[[[[['0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 '
            '21 22 23 24 25 26 27 28 29']]]]]]]]]]],
 [[[[[[[[[[['0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 '
            '21 22 23 24 25 26 27 28 29']]]]]]]]]]]]

As you can see in second example there is a place for at least '21 22 23 ' at the right. In case of multiline representation of nested items pprint can reserve space only at the end of last line and continue inner lines to full width.