fails:Array#to_s represents a recursive element with '[...]'
fails:Array#to_s taints the result if the Array is non-empty and tainted
fails:Array#to_s does not taint the result if the Array is tainted but empty
fails:Array#to_s taints the result if an element is tainted
fails:Array#to_s untrusts the result if the Array is untrusted
fails:Array#to_s does not untrust the result if the Array is untrusted but empty
fails:Array#to_s untrusts the result if an element is untrusted
fails:Array#to_s with encoding returns a US-ASCII string for an empty Array
fails:Array#to_s with encoding use US-ASCII encoding if the default external encoding is not ascii compatible
fails:Array#to_s with encoding raises if inspected result is not default external encoding
fails:Array#to_s with encoding use the default external encoding if it is ascii compatible
