p.416 locals opts[:columns] without default value
Reported by Thorsten | June 22nd, 2008 @ 12:42 AM | in Second Edition
You already set a default value for opts[:columns] in code line 4 (opts[:columns] ||= 3), and thus you don't need to repeat this on line 12 (:columns => opts[:columns] || 3,...)
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Obie