fixup! BUG: Fix/test SparseSeries/SparseDataFrame stack/unstack

Author: kernc

doc/source/whatsnew/v0.20.2.txt

@@ -52,9 +52,6 @@ Bug Fixes
 - Bug in :func:`cut` when ``labels`` are set, resulting in incorrect label ordering (:issue:`16459`)
 - Fixed a compatibility issue with IPython 6.0's tab completion showing deprecation warnings on ``Categoricals`` (:issue:`16409`)
 
-- Bug in ``SparseSeries.unstack()`` and ``SparseDataFrame.stack()`` (:issue:`16614`, :issue:`15045`)
-
-
 Conversion
 ^^^^^^^^^^
 

doc/source/whatsnew/v0.21.0.txt

@@ -143,6 +143,7 @@ Bug Fixes
 ~~~~~~~~~
 
 - Fixes regression in 0.20, :func:`Series.aggregate` and :func:`DataFrame.aggregate` allow dictionaries as return values again (:issue:`16741`)
+- Bug in :func:`SparseSeries.unstack` and :func:`SparseDataFrame.stack` (:issue:`16614`, :issue:`15045`)
 
 Conversion
 ^^^^^^^^^^