fails:Enumerable#min min should return the minimum element
fails:Enumerable#min returns the minimum (basic cases)
fails:Enumerable#min returns nil for an empty Enumerable
fails:Enumerable#min raises a NoMethodError for elements without #<=>
fails:Enumerable#min raises an ArgumentError for incomparable elements
fails:Enumerable#min returns the minimum when using a block rule
fails:Enumerable#min returns the minimum for enumerables that contain nils
fails:Enumerable#min gathers whole arrays as elements when each yields multiple
