Comments within dict hanging indents are rearranged strangely.

With google style, yapf is trying to reformat this:
```python
{
'this_is_long_enough_to_require_a_hanging_indent':
this_is_long_enough_to_require_a_hanging_indent,
'foo':
# Fooooosdf sdkfjdklsfj dsklf jdsklfjdsklfj dsklfj sdklfjdskl fjdskl
# fjdskl fjdskl fjdsklfj dklsfjdkls fjdsklfjdsklfjdskl.
True,
}
```

Like this:

```python
{
'this_is_long_enough_to_require_a_hanging_indent':
this_is_long_enough_to_require_a_hanging_indent,
'foo': # Fooooosdf sdkfjdklsfj dsklf jdsklfjdsklfj dsklfj sdklfjdskl fjdskl
# fjdskl fjdskl fjdsklfj dklsfjdkls fjdsklfjdsklfjdskl.
True,
}
```