Ok, that’s weird. I just compared the ASCII code of the ° in my heating zone device handler and it’s the same as the ° symbol in the SmartSense Multi device handler template. But perhaps it’s being mangled when it’s uploaded or downloaded from GitHub?
You could try opening the SmartSense Multi device handler template and copying the ° and pasting it into your copy of the heating zone device handler, that might fix it?
Update: See this post. - the problem seems to be when you copy from the RAW view in GitHub. Try copying from the Normal View instead.