Bug #6313 ยป clarify_default_not_zero.diff
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/*
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* call-seq:
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* srand(number=0) -> old_seed
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* srand(number) -> old_seed
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* srand -> old_seed
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*
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* Seeds the system pseudo-random number generator, Random::DEFAULT, with
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* +number+. The previous seed value is returned.
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