Reviewed SpSum Op and completed non-grad-related tests.

theano/sparse/sandbox/test_sp.py

@@ -18,6 +18,8 @@ from theano.sparse.sandbox import sp
 from theano.tests import unittest_tools as utt
 from theano.sparse.tests.test_basic import random_lil
 
+
+
 class TestSP(unittest.TestCase):
     def test_convolution(self):
         print '\n\n*************************************************'