DOC: more fixes for v0.18.0

Author: jreback

doc/source/whatsnew/v0.18.0.txt

@@ -112,19 +112,18 @@ Changes to rename
 ``Series.rename`` and ``NDFrame.rename_axis`` can now take a scalar or list-like
 argument for altering the Series or axis *name*, in addition to their old behaviors of altering labels. (:issue:`9494`, :issue:`11965`)
 
-.. ipython: python
+.. ipython:: python
 
-   s = pd.Series(np.random.randn(10))
+   s = pd.Series(np.random.randn(5))
    s.rename('newname')
 
-.. ipython: python
+.. ipython:: python
 
-   df = pd.DataFrame(np.random.randn(10, 2))
+   df = pd.DataFrame(np.random.randn(5, 2))
    (df.rename_axis("indexname")
       .rename_axis("columns_name", axis="columns"))
 
-The new functionality works well in method chains.
-Previously these methods only accepted functions or dicts mapping a *label* to a new label.
+The new functionality works well in method chains. Previously these methods only accepted functions or dicts mapping a *label* to a new label.
 This continues to work as before for function or dict-like values.