How can I format text in a message.

I want to display formatted text in this manner:

{model_information.payload.size} {model_information.payload.name}

{model_information.payload.size} {model_information.payload.name}

Price: {model_information.payload.price}
Rent-to-own Pricing;
- 36 months = {model_information.payload.rto48m}
- 48 months = {model_information.payload.rto48m}
- 60 months = {model_information.payload.rto60m}

But no matter how how many spaces or newline characters I add the text gets put on the same line. Is there a way to format the text?