[issue20203] ArgumentClinic: support middle optional argument

[Ryan Smith-Roberts]

New submission from Ryan Smith-Roberts:

socket.sendto is apparently even weirder than addch or range: the optional argument is in the *middle*. Attempting this configuration gets me:

Function sendto has an unsupported group configuration. (Unexpected state 5)

An expected unexpected configuration? :)

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components: Build
messages: 207731
nosy: larry, rmsr
priority: normal
severity: normal
status: open
title: ArgumentClinic: support middle optional argument
type: enhancement
versions: Python 3.4

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue20203>
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