format `broadcast use` to something not parseable

The formatter formats
```
broadcast use ModuleName::lemma_with_a_really_long_name;
```
to 

```
broadcast use
    ModuleName::lemma_with_a_really_long_name,
;
```
Witch isn't parsable.
```
error: expected identifier
    |
    |             ;
    |             ^
```