cypclass constructor wrapper access in user code (__constructor__)

Cython/Compiler/Symtab.py

@@ -2719,6 +2719,8 @@ class CppClassScope(Scope):
             name = "<del>"
         elif name == "__alloc__":
             name = "<alloc>"
+        elif name == "__constructor__":
+            name = "<constructor>"
         else:
             operator = self.operator_table.get(name, None)
             if operator: