DOC: whatsnew fix for str/dt

Author: jreback

doc/source/categorical.rst

@@ -526,12 +526,12 @@ type:
 
 .. ipython:: python
 
-    str_s = pd.Series(list('aabb'))
-    str_cat = str_s.astype('category')
+    str_cat = pd.Series(list('aabb')).astype('category')
+    str_cat
     str_cat.str.contains("a")
 
-    date_s = pd.Series(date_range('1/1/2015', periods=5))
-    date_cat = date_s.astype('category')
+    date_cat = pd.Series(date_range('1/1/2015', periods=5)).astype('category')
+    date_cat
     date_cat.dt.day
 
 .. note::

doc/source/whatsnew/v0.17.1.txt

@@ -81,6 +81,16 @@ Enhancements
 
 - Series of type ``"category"`` now make ``.str.<...>`` and ``.dt.<...>`` accessor methods / properties available, if the categories are of that type. (:issue:`10661`)
 
+  .. ipython:: python
+
+     s = pd.Series(list('aabb')).astype('category')
+     s
+     s.str.contains("a")
+
+     date = pd.Series(date_range('1/1/2015', periods=5)).astype('category')
+     date
+     date.dt.day
+
 - ``pivot_table`` now has a ``margins_name`` argument so you can use something other than the default of 'All' (:issue:`3335`)
 - Implement export of ``datetime64[ns, tz]`` dtypes with a fixed HDF5 store (:issue:`11411`)