PR num

Author: dsaxton

doc/source/whatsnew/v1.1.0.rst

@@ -601,7 +601,7 @@ Other
 - Bug in :meth:`Series.map` not raising on invalid ``na_action`` (:issue:`32815`)
 - Bug in :meth:`DataFrame.__dir__` caused a segfault when using unicode surrogates in a column name (:issue:`25509`)
 - Bug in :meth:`DataFrame.plot.scatter` caused an error when plotting variable marker sizes (:issue:`32904`)
-- :class:`IntegerArray` now implements the ``sum`` operation
+- :class:`IntegerArray` now implements the ``sum`` operation (:issue:`33538`)
 
 .. ---------------------------------------------------------------------------