Fixed test in new Similarity interface

Also fixed constructor of old interface to throw the DeprecationWarning

Author: oesteban

nipype/algorithms/metrics.py

@@ -529,7 +529,7 @@ class Similarity(BaseInterface):
 
     Example
     -------
-    >>> from nipype.interfaces.nipy.utils import Similarity
+    >>> from nipype.algorithms.metrics import Similarity
     >>> similarity = Similarity()
     >>> similarity.inputs.volume1 = 'rc1s1.nii'
     >>> similarity.inputs.volume2 = 'rc1s2.nii'

nipype/interfaces/nipy/utils.py

@@ -26,7 +26,6 @@
 
 
 class SimilarityInputSpec(BaseInterfaceInputSpec):
-
     volume1 = File(exists=True, desc="3D volume", mandatory=True)
     volume2 = File(exists=True, desc="3D volume", mandatory=True)
     mask1 = File(exists=True, desc="3D volume")
@@ -44,7 +43,6 @@ class SimilarityInputSpec(BaseInterfaceInputSpec):
 
 
 class SimilarityOutputSpec(TraitedSpec):
-
     similarity = traits.Float(desc="Similarity between volume 1 and 2")
 
 
@@ -72,7 +70,7 @@ def __init__(self, **inputs):
         warnings.warn(("This interface is deprecated since 0.10.0."
                       " Please use nipype.algorithms.metrics.Similarity"),
                       DeprecationWarning)
-        super(BaseInterface,self).__init__(**inputs)
+        super(Similarity,self).__init__(**inputs)
 
     def _run_interface(self, runtime):