better logic around where the yes and no are in a condition

[sugendran]

I haven't dug into the code yet but it would be good if the join symbol code could work out which path goes back up the tree and then draw that coming out the side of the conditional. If you have a look at the attached flowchart you'll see a while statement that would be better expressed with the yes line coming out the side.

[adrai]

pull requests are welcome :-)