> (ReadStream on: #(1 2 3 4 5) from: 3 to: 3) size
> 
> Returns 3.
> 
> I have to disagree that size is properly implemented.

Actually, this example demonstrates that from:to: is not properly implemented. 
If we do:

  (ReadStream on: #(1 2 3 4 5) from: 3 to: 3) contents

we see that size is, in fact, reporting the correct answer.

 - Chris

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