fix newline

Author: sjalkote

pandas/core/accessor.py

@@ -313,7 +313,6 @@ def __init__(self, pandas_obj):
         def sum(self):
             return self._obj.sum()
 
-
 Back in an interactive IPython session:
 
 .. code-block:: ipython
@@ -359,7 +358,6 @@ def __init__(self, pandas_obj):
         def sum(self):
             return self._obj.sum()
 
-
 Back in an interactive IPython session:
 
 .. code-block:: ipython