[docs] [issue16503] Unclear documentation regarding apply(), 'extended call syntax'

[Roundup Robot]

Roundup Robot added the comment:

New changeset 7efa0d66b1a0 by Ezio Melotti in branch '2.7':
#16503: clarify "apply" docs.
http://hg.python.org/cpython/rev/7efa0d66b1a0

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nosy: +python-dev

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