diff --git a/GPy/core/parameterization/param.py b/GPy/core/parameterization/param.py
index 91ce9e24..8fdd744e 100644
--- a/GPy/core/parameterization/param.py
+++ b/GPy/core/parameterization/param.py
@@ -42,7 +42,7 @@ class Param(Parameterizable, ObsAr):
     Multilevel indexing (e.g. self[:2][1:]) is not supported and might lead to unexpected behaviour.
     Try to index in one go, using boolean indexing or the numpy builtin
     np.index function.
-    
+
     See :py:class:`GPy.core.parameterized.Parameterized` for more details on constraining etc.
 
     """
@@ -180,6 +180,7 @@ class Param(Parameterizable, ObsAr):
         import copy
         Pickleable.__setstate__(s, copy.deepcopy(self.__getstate__(), memo))
         return s
+
     def _setup_observers(self):
         """
         Setup the default observers