Cleanup, document decision to let optimization achieve better unpacking
Cleanup, document decision to let optimization achieve better unpacking

* We could avoid to provide as many non-tuple arguments when there is
  unpacking or starred arguments with multiple non-starred ones.

* This however is better done within optimization, once it can do it,
  and not during tree building manually.

kayhayen/Nuitka,kayhayen/Nuitka,kayhayen/Nuitka,kayhayen/Nuitka