Tim... all it needs for single space is this...

So merry, so merry, so merry are we(br)
Not a mortal on earth, like a sailor at sea(br)
Heave away, haul away, swab the decks down(br)
Give a sailor his grog, and nothing goes wrong

where the ( ) are really angle brackets...to do this, I added the 'br' with angle brackets AFTER the (br), but you can't see them unless you 'view the source'...or the HTML version which the machine reads...