pep8 compliant

theano/gradient.py

@@ -1979,6 +1979,7 @@ class ZeroGrad(ViewOp):
         
         return theano.tensor.zeros(1)
 
+
 zero_grad_ = ZeroGrad()
 
 

theano/tests/test_gradient.py

@@ -663,7 +663,7 @@ class TestZeroGrad(unittest.TestCase):
         x = theano.tensor.matrix('x')
         y = x * gradient.zero_grad(x)
         f = theano.function([x], y)
-        # need to refer to theano.ogradient.zero_grad here,
+        # need to refer to theano.gradient.zero_grad here,
         # theano.gradient.zero_grad is a wrapper function!
         assert gradient.zero_grad_ not in \
             [node.op for node in f.maker.fgraph.toposort()]
@@ -706,7 +706,7 @@ class TestZeroGrad(unittest.TestCase):
         u = np.asarray(self.rng.randn(5),
                        dtype=config.floatX)
 
-        assert np.count_nonzero(f(a,u)) == 0
+        assert np.count_nonzero(f(a, u)) == 0
 
 
 class TestDisconnectedGrad(unittest.TestCase):