Replace comma with linebreak

Hi,

I'm very much a newbie and only started getting this working at all for me. It seems great in combination with Workflowy BUT:

When I use the above example in Workflowy i get:

* Original Address
* 123 Main Street, USA

* Modified Address
* 123 Main Street, 
      *USA

This is close to what i need but i need a 'soft' line break to avoid workflowy creating a new 'node' (as it's known in Workflowy)