Closed Issue: Should().NotBeEmpty() enumerates collection twice [10363]

I have a service that returns IEnumerable<T> and enumeration is fairly slow.
I am writing a smoke test that just makes sure something is returned:

service.GetAll().Should().NotBeEmpty();

I see that my collection gets enumerated twice (something I would not expect from such assertion).

This issue is tightly linked to http://fluentassertions.codeplex.com/workitem/10362
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