Wrap built comments into an array

On tutorial8.md, the final code for the comment-list has lost the <code>into-array</code> from previously in the tutorial. A call to <code>prn</code> with the results seems to show that, without that,  just a standard list of objects is being returned, and an id is all that gets rendered. Once I added <code>into-array</code> back in, the comments rendered correctly.