Is it possible to break a line in a data_template? I’ve tried everything I can think of (even reading the docs!) and now I’m just guessing. I cannot make this work in any form except by putting it all on one line which is not really very satisfactory for readability. And yes I am trying to perform addition on 5 entities, the plus sign is not one of my attempts and finding a line break character!
I just did a google search for linebreaks in jinja and it looks like you have to make a custom function for jinja. That pretty much means it’s not possible for home assistant because its unlikely that they added that in.
I only quickly looked, so maybe you could search and find another answer that may work for you.