[TxMt] indentedSoftWrap, marker on the next line?

Hello again,

I've got indentedSoftWrap configured and enabled for json with the following config:

indentedSoftWrap = { match = '(\A[ \t]*)'; format = ' ⏎$1'; };

Which works, and I've been enjoying it, but I'm wondering if the special character could go on the next line?

Right now I've got

{ "someLongKey": "with some really long value that just keeps ⏎ going and going", }

but I'd like to see { "someLongKey": "with some really long value that just keeps ↘︎ going and going", }

I tried altering the format, but was unsuccessful in getting anything to appear on the next line.

Thanks, Graham