fix newline

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