Add docstring per code review.

theano/tensor/basic.py

@@ -2370,6 +2370,9 @@ class SpecifyShape(Op):
 
     def c_code(self, node, nodename, inp, out, sub):
         if not isinstance(node.inputs[0], TensorVariable):
+            # The c code bellow support only Tensor.  super.c_code
+            # will raise an exception to tell that there isn't c code
+            # for the other cases.
             return super(SpecifyShape, self).c_code(node, nodename,
                                                     inp, out, sub)
         iname, shape = inp

theano/tensor/tests/test_basic.py

@@ -6327,7 +6327,12 @@ def test_transpose():
 
 
 class TestSpecifyShape(unittest.TestCase):
+    def shortDescription(self):
+        return None
+
     def test_bad_shape(self):
+        """ Test that at run time we raise an exception when the shape
+        is not the one specified"""
         specify_shape = SpecifyShape()
 
         x = vector()
@@ -6346,6 +6351,7 @@ class TestSpecifyShape(unittest.TestCase):
             self.assertRaises(AssertionError, f, xval)
 
     def test_bad_number_of_shape(self):
+        """ Test that the number of dimensions provided is good"""
         specify_shape = SpecifyShape()
 
         x = vector()