pep8

theano/gof/tests/test_sched.py

 from theano.gof.sched import (make_dependence_cmp, sort_apply_nodes,
-        reverse_dict, _toposort, posort)
+                              reverse_dict, _toposort, posort)
 
 import theano
 from theano import tensor
@@ -7,6 +7,7 @@ from theano.gof.graph import io_toposort
 from theano.gof.python25 import any
 from theano.compat import cmp
 
+
 def test_dependence():
     dependence = make_dependence_cmp()