[docs] [issue15990] solidify argument/parameter terminology

[Roundup Robot]

Roundup Robot added the comment:

New changeset ecf3cd3af502 by Chris Jerdonek in branch '2.7':
Add additional links and index entries for "argument" and "parameter".
http://hg.python.org/cpython/rev/ecf3cd3af502

New changeset 31e1f0b7f42e by Chris Jerdonek in branch '3.2':
Add additional links and index entries for "argument" and "parameter".
http://hg.python.org/cpython/rev/31e1f0b7f42e

New changeset 7a4a1fc6b3ee by Chris Jerdonek in branch '3.3':
Merge from 3.2: add links and index entries for "argument" and "parameter."
http://hg.python.org/cpython/rev/7a4a1fc6b3ee

New changeset 10e4d28d0090 by Chris Jerdonek in branch 'default':
Merge from 3.3: add links and index entries for "argument" and "parameter."
http://hg.python.org/cpython/rev/10e4d28d0090

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<http://bugs.python.org/issue15990>
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