[docs] [issue29414] Change 'the for statement is such an iterator' in Tutorial

[Marco Buttu]

Marco Buttu added the comment:

Even though the Terry suggestion is formally correct, we are just at the beginning of the tutorial, and unluckily the tuples have not been introduced yet. To avoid adding to much complication here, IMHO we can just left the preceding sentences as they are.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue29414>
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