how to add new line in Deluge?

how to add new line in Deluge?

I want to make string with line separation like this:

  1. this is the first line

  2. second line

  3. third line
I have tried to use \n <br> or </br> inside the string but I can't achieve the result like the example above. 

I want to create  a task by using custom function via Deluge API (that 'invoke' method), but the 'description' field looks ugly because I can't add a new line inside the string