REGR/DOC: pd.concat should special case DatetimeIndex to sort even when sort=False #57250
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doc/source/whatsnew/v2.2.1.rst
file if fixing a bug or adding a new feature.Reverts the changes from #54769 due to long-standing behavior and documents the behavior instead.
See discussion regarding the inconsistency of the long-standing behavior here: #57006 (comment)