DEDENT_CLOSING_BRACKETS doesn't always dedent

I've `DEDENT_CLOSING_BRACKETS = true`, and it most of the times, but not sometimes.

Here's a change that yapf applies:

```diff
@@ -942,13 +934,12 @@ class Order(BaseOrder):
paths[link_name] = target

for image in p.product.images.all():
- link_name = (
- '{product}/P-{order}/originals/{filename}'
- ).format(
- product=p.product_name,
- order=self.pk,
- filename=image.photo.original_filename,
- )
+ link_name = ('{product}/P-{order}/originals/{filename}'
+ ).format(
+ product=p.product_name,
+ order=self.pk,
+ filename=image.photo.original_filename,
+ )
target = image.photo.image
paths[link_name] = target

```

I think that becuase `).format` doesn't fit in this line, it moves it into the next (although the arguments and the closing bracket by themselves do fit), but doesn't respect dedenting.