GroupbyAggregation pprint looks bad

```python
GroupbyAggregation(GroupByChunk): funcs=[('count-avg_disc-19867fc26207a1553dedcd211f9af25d', , {'column': 'avg_disc', 'func': }), ('count-avg_price-ad63d489139fa4e395b0154578687dea', , {'column': 'avg_price', 'func': }), ('count-avg_qty-03530243c453851d364a5d5eb2e58bd9', , {'column': 'avg_qty', 'func': }), ('count-count_order-dc78eab80e1e0bca634b2385fc6348a1', , {'column': 'count_order', 'func': }), ('sum-avg_disc-8d7b4de80d639868e6536a21a5742edb', , {'column': 'avg_disc', 'func': }), ('sum-avg_price-5bf00f0201fa685eed46bb6516686900', , {'column': 'avg_price', 'func': }), ('sum-avg_qty-98e31ef254571fad522ea67c1d5aa1dc', , {'column': 'avg_qty', 'func': }), ('sum-sum_base_price-12354f69f6976168a41ef9a85498102b', , {'column': 'sum_base_price', 'func': }), ('sum-sum_charge-8cfa90f484abb1ce968dd6df6c055441', , {'column': 'sum_charge', 'func': }), ('sum-sum_disc_price-ae6d64e8e509674f89593a76d0b25962', , {'column': 'sum_disc_price', 'func': }), ('sum-sum_qty-9a0262ba7b828188f5a52fbf78bea047', , {'column': 'sum_qty', 'func': })] sort=False
```