Gain the break from the right and traverse it, simple as that. Ray's Roof also finishes by grovelling off left at the break. The line in the Rockfax Western grit guide (or at least the old edition) is totally wrong.
On a related note I was looking at the topo lines on Black Rocks in the Rockfax Eastern Grit guide. Amazingly how many lines are in the wrong place and not just by a bit, I mean way off target, all on harder routes (Velvet Silence etc on the block, Caught Smiling, Discombobulator, The Devil is in the Detail, A Day at the Proms...),. Very sloppy indeed!