merge2 and merge3 were not actually MergeOptimizers (oops)

theano/compile/mode.py

@@ -74,9 +74,9 @@ optdb = gof.SequenceDB()
 optdb.register('merge1', gof.MergeOptimizer(), 0, 'fast_run', 'fast_compile')
 optdb.register('canonicalize', gof.EquilibriumDB(), 1, 'fast_run')
 optdb.register('specialize', gof.EquilibriumDB(), 2, 'fast_run')
-optdb.register('merge2', gof.EquilibriumDB(), 49, 'fast_run')
+optdb.register('merge2', gof.MergeOptimizer(), 49, 'fast_run')
 optdb.register('add_destroy_handler', AddDestroyHandler(), 49.5, 'fast_run', 'inplace')
-optdb.register('merge3', gof.EquilibriumDB(), 100, 'fast_run')
+optdb.register('merge3', gof.MergeOptimizer(), 100, 'fast_run')
 
 
 class Mode(object):

theano/tensor/opt.py

@@ -251,7 +251,7 @@ def local_subtensor_make_vector(node):
     """
     if not opt.check_chain(node, T.Subtensor, T.MakeVector):
         return False
-    
+
     joined_r = node.inputs[0]
 
     try: