Adjusting a slur after line break

[Chris Yate]

Hi,

I'm having trouble with a long slurred passage, where the final note appears on a new line.  

The slur shape is quite wrong after the line break in both upper and lower parts, but I've included only the upper part here.

Snippet ly (actual excerpt) and a PNG attached -- I think there's a thing called "alterBroken" but I can't work out how to use it.

Hopefully someone can help!

Thanks in advance,

Chris

WeirdSlur.ly
Description: Text Data

WeirdSlur.png
Description: PNG image