Transpose eagerly calls GetEnumerator

[Orace]

Like #729, with current implementation of Transpose,
The code below throws:

var sequences = new IEnumerable<int>[]
{
    TestingSequence.Of(1),
    new BreakingSequence<int>()
};

var transpose = sequences.Transpose().Take(1).ToList();

While we can expect transpose to be a list of one element.

[Orace]

Since transpose emit batch, it's a normal behavior.