[MERGE] Document code layout stuff

[Alexander Belchenko]

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Martin Pool пишет:
>> What about assigning result to some value?
>>
>> foo = self.legbone.kneebone.shinbone.toebone.shake_it(
>>          one, two, three)
>>
>> What correct rule for this case?
> 
> 'one' should be four spaces to the right of the start of the preceding
> line, 'foo'.  It's not indented relative to the assignment operator.

I.e.:

foo = self.legbone.kneebone.shinbone.toebone.shake_it(
    one, two, three)

or another dummy example:

foobarspam = self.legbone.kneebone.shinbone.toebone.shake_it(
    one, two, three)

/me don't like this variant 'cause equal sign is hard to see here.

/sigh/

[µ]
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