This solves a small reformatting problem with tuples

```
def f():
    man_this_is_a_very_long_function_name(an_extremely_long_variable_name,
                                          ('a string that is long: %s'%'bork'))
```

becomes this:

```
def f():
    man_this_is_a_very_long_function_name(
        an_extremely_long_variable_name, ('a string that is long: %s' % 'bork'))
```

But it's still over 79 columns in length. With this patch, it formats it as this:

```
def f():
    man_this_is_a_very_long_function_name(
        an_extremely_long_variable_name,
        ('a string that is long: %s' %
         'bork'))
```