Try to make sure that the support code is not duplicated due to whitespace differences.

theano/scalar/basic.py

@@ -3018,7 +3018,7 @@ class Composite(ScalarOp):
         rval = []
         for subnode in self.fgraph.toposort():
             try:
-                rval.append(subnode.op.c_support_code())
+                rval.append(subnode.op.c_support_code().strip())
             except gof.utils.MethodNotDefined:
                 pass
         # remove duplicate code blocks