Handy! I wanted to do this the other day with a poem, just to see how the text-to-speech engine handled it, but couldn't.

What I did discover after publishing and clicking the option was that where a line ended with a full stop but no trailing space after it, because poetry is single-spaced, the engine interpreted it as a web address, and read it as 'dot'.

So

"This line ending here.

And this new line"

would be read as

"This line ending here-dot-and

This new line".