[docs] [issue10977] Concrete object C API considered harmful to subclasses of builtin types

[ppperry]

Changes by ppperry <mapreader at olum.org>:


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title: Concrete object C API considered harmful to subclasses of builtin typesje -> Concrete object C API considered harmful to subclasses of builtin types

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue10977>
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