I must admit that I don't entirely understand your original example, so I'm not sure this will help, but given that - as you pointed out - you can add linebreaks into code, why don't you create your string as
"this is a"* "multiline string"
I must admit that I don't entirely understand your original example, so I'm not sure this will help, but given that - as you pointed out - you can add linebreaks into code, why don't you create your string as
"this is a"* "multiline string"