Ruby on Rails

Can someone explain this for me please?

range = (DateTime.now..DateTime.now+1.hour).step(10.minute)
=> #<Enumerator: Sat, 26 Sep 2015 16:41:18 +0100..Sat, 26 Sep 2015
17:41:18 +0100:step(600 seconds)>
2.1.3 :009 > range.to_a
=> [Sat, 26 Sep 2015 16:41:18 +0100]

Not what I expected at all.

Colin

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