allow line break at operators

[Yingjie Lan]

>> In terms of easier to read, I find code easier to read when the

>> operators are at the beginnings of the lines (PEP 8 notwithstanding):
>>
>>    x = (someobject.somemethod(object3, thing)
>>         + longfunctionname(object2)
>>         + otherfunction(value1, value2, value3))
>>
> 
> Without the parentheses, this is legal but (probably) useless; it
> applies the unary + operator to the return value of those functions.

If ';' are employed (required), truely free line-splitting should be OK, 
the operators may appear at the beginnings of the lines as you wish.

Yingjie