[issue41621] Document collections.defaultdict parameter default_factory

[Terry J. Reedy]

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


New changeset d1ae57027fc39ff60dcfc1b63881400e5ca3ce56 by Dennis Sweeney in branch 'main':
bpo-41621: Document defaultdict's default_factory parameter (GH-21945)
https://github.com/python/cpython/commit/d1ae57027fc39ff60dcfc1b63881400e5ca3ce56


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nosy: +terry.reedy

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