[issue21139] Idle: change default reformat width from 70 to 72

[Saimadhav Heblikar]

Changes by Saimadhav Heblikar <saimadhavheblikar at gmail.com>:


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nosy: +sahutd

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21139>
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