Fix coding style errors

Cython/Compiler/CypclassTransforms.py

@@ -190,7 +190,7 @@ def NAME(ARGDECLS):
         node_type = node.entry.type
 
         for wrapped_base_type in node_type.iter_wrapped_base_types():
-            if not wrapped_base_type in self.synthesized:
+            if wrapped_base_type not in self.synthesized:
                 self.base_type_to_deferred[wrapped_base_type].append(lambda: self.synthesize_wrappers(node))
                 return