Docs now in whatnew 17.0

Author: Nick Eubank

doc/source/whatsnew/v0.17.0.txt

@@ -33,6 +33,34 @@ Backwards incompatible API changes
 
 .. _whatsnew_0170.api_breaking:
 
+- default behavior for HDF write functions with "table" format is now to keep rows that are all missing except for index. (:issue:`9382`)
+
+Previously,
+
+.. code-block:: python
+
+   In [1]: 
+   df_with_missing = pd.DataFrame({'col1':[0, np.nan, 2], 'col2':[1, np.nan, 3]})
+   df_with_missing.to_hdf('file.h5', 'df_with_missing', format = 't')
+   
+   pd.read_hdf('file.h5', 'df_with_missing')
+   
+   Out [1]: 
+         col1  col2
+     0     0     1
+     2     2     3
+
+
+New behavior: 
+
+.. ipython:: python
+
+   df_with_missing = pd.DataFrame({'col1':[0, np.nan, 2], 'col2':[1, np.nan, 3]})
+   df_with_missing.to_hdf('file.h5', 'df_with_missing', format = 't')
+   
+   pd.read_hdf('file.h5', 'df_with_missing')
+
+
 .. _whatsnew_0170.api_breaking.other:
 
 Other API Changes