[issue16446] pdb raises BdbQuit on 'quit' when started with set_trace

[Serhiy Storchaka]

Changes by Serhiy Storchaka <storchaka at gmail.com>:


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versions: +Python 3.2, Python 3.3

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16446>
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