Bug #2210 ยป string-try-convert.patch
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* String.try_convert(obj) -> string or nil
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*
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* Try to convert <i>obj</i> into a String, using to_str method.
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* Returns converted regexp or nil if <i>obj</i> cannot be converted
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* Returns converted string or nil if <i>obj</i> cannot be converted
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* for any reason.
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*
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* String.try_convert("str") # => str
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