Allow function call parameters to be on different lines

[PLPeeters]

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?

[bwendling]

I'm not opposed to the idea of adding this as an option. It can help in cases where the heuristics fail. I'll add this as an enhancement.

[jorisvandenbossche]

Related to this, but a little bit the opposite, code like this:

    def __init__(self, values, categories=None, ordered=False, name=None,
                 fastpath=False, levels=None):
        pass

gets reformatted as

    def __init__(self,
                 values,
                 categories=None,
                 ordered=False,
                 name=None,
                 fastpath=False,
                 levels=None):
        pass

Is there a way to configure yapf to prefer the first? (it's within 79 chars line length limit)