DOC: update the pandas.Series.tail docstring

Author: Berra Marco

Diff for: pandas/core/generic.py

@@ -3669,12 +3669,12 @@ def tail(self, n=5):
 
         Returns
         -------
-        obj_tail : type of caller
-            The last n rows of the caller object.
+        type of caller
+            The last `n` rows of the caller object.
 
         See Also
         --------
-        pandas.DataFrame.head
+        pandas.DataFrame.head : The first `n` rows of the caller object.
 
         Examples
         --------

Diff for: pandas/core/indexes/base.py

@@ -1156,7 +1156,7 @@ def to_frame(self, index=True):
         >>> idx = pd.Index(['Ant', 'Bear', 'Cow'], name='animal')
         >>> idx.to_frame()
             animal
-        animal       
+        animal
         Ant       Ant
         Bear     Bear
         Cow       Cow