[issue24147] Dialect class defaults are not documented.

[So Ukiyama]

Change by So Ukiyama <uniocto.streie25r3p05pf at gmail.com>:


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keywords: +patch
nosy: +uniocto
nosy_count: 7.0 -> 8.0
pull_requests: +24641
stage: needs patch -> patch review
pull_request: https://github.com/python/cpython/pull/25989

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue24147>
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