Is there a knob for preventing right-hanging line breaks?

This is the output from yapf, which breaks up a list of tuples at a strange spot. I would like it to either put the list on a new line or make the break more "balanced", but I couldn't see a knob for doing this.

```
def test_plain_old_data(self):
self.assertEqual(a_node._asdict(),
collections.OrderedDict([('a', 1), ('b', 2), ('c',
3)]))
```

I'd prefer one of these for the assertEqual:

```
self.assertEqual(a_node._asdict(),
collections.OrderedDict([
('a', 1), ('b', 2), ('c', 3)]))
```

or

```
self.assertEqual(a_node._asdict(),
collections.OrderedDict([('a', 1), ('b', 2),
('c', 3)]))
```

or

```
self.assertEqual(
a_node._asdict(),
collections.OrderedDict([('a', 1), ('b', 2), ('c', 3)]))
```