Breakline in value_template sensor

Hello people,
I defined a sensor (platform: command_line) that reads values from a json file.
In the value_template I put this code:

value_template: >
{% set month = now().month | string %}
{% for x in value_json.birthday["" + month + “”] %}
{{ value_json.birthday["" + month + “”][x] }}
{% endfor %}

It works well, only that I would like to insert a new line for each value.
I get:
Marco’s birthday Andrea’s birthday Mike’s birthday
but I would:
Marco’s birthday
Andrea’s birthday
Mike’s birthday

I tried them all but I can’t. It’s possible?!
Thanks.