Typo fixes

theano/sandbox/cuda/tests/test_basic_ops.py

@@ -905,7 +905,7 @@ class T_subtensor(theano.tensor.tests.test_basic.T_subtensor):
 
             # Test with input strided
             t = self.adv_sub1()(n[::-1], idx)
-            #DebugMode do a copy of the input, so we loose the strides.
+            #DebugMode does a copy of the input, so we lose the strides.
             if not isinstance(theano.compile.get_default_mode(),
                               theano.compile.DebugMode):
                 t.owner.op.perform_using_take = fast