Allow function call parameters to be on different lines

I couldn't find a style option to allow function call parameters to be on different lines.

For instance:

```
foo(very_long_parameter_1,
very_long_parameter_2,
very_long_parameter_3)
```

Gets changed to:

```
foo(very_long_parameter_1, very_long_parameter_2, very_long_parameter_3)
```

I think this use case is common enough to justify a style option. Thoughts?