fails:Array#hash returns the same fixnum for arrays with the same content
fails:Array#hash returns the same hash for equal recursive arrays
fails:Array#hash returns the same hash for equal recursive arrays through hashes
fails:Array#hash calls to_int on result of calling hash on each element
fails:Array#hash ignores array class differences
fails:Array#hash returns same hash code for arrays with the same content
fails:Array#hash returns the same value if arrays are #eql?
