PEP-8: clarify if multiline argument list with a closing `)` on a separate line is acceptable

[brettcannon]

@allan-simon

Actually it was more about I’ve seen nothing in PEP-8 stating it was not compliant.

The trick with style guides is the potential list of unacceptable formats is nearly infinite while documenting what is acceptable is tractable. So assume if something is not listed as acceptable then it isn’t .