[issue5374] optparse special usage tokens conflict with formatting characters

[Tim Gordon]

Tim Gordon <tim.py at aleph17.co.uk> added the comment:

Try escaping the '%prog' in your usage string (i.e. use '%%prog' 
instead) so you don't get the error when you substitute values in.

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nosy: +QuantumTim

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue5374>
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