[issue38022] IDLE: Upgrade help.html to sphinx 2

[Terry J. Reedy]

Terry J. Reedy <tjreedy at udel.edu> added the comment:

Using -D was a temporary kludge until someone updated the html2tk writer.  The key to the fix was adding the prevtag attribute with opener? field.

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resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38022>
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