[docs] [issue16747] Remove 'file' type reference from 'iterable' glossary entry

[Zachary Ware]

Changes by Zachary Ware <zachary.ware at gmail.com>:


Added file: http://bugs.python.org/file28525/issue16747.diff

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16747>
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