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Correct Glossary key function example to use str.casefold instead of str.lower #140316

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Correct Glossary key function example to use str.casefold instead of str.lower #140316

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2 changes: 1 addition & 1 deletion Doc/glossary.rst
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Expand Up @@ -813,7 +813,7 @@ Glossary
:func:`itertools.groupby`.

There are several ways to create a key function. For example. the
:meth:`str.lower` method can serve as a key function for case insensitive
:meth:`str.casefold` method can serve as a key function for case insensitive
sorts. Alternatively, a key function can be built from a
:keyword:`lambda` expression such as ``lambda r: (r[0], r[2])``. Also,
:func:`operator.attrgetter`, :func:`operator.itemgetter`, and
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