Custom Template Naming Convention...
 

I found in the manual, "Custom function names should be all lower-case and should use underscores to separate words."

I am wondering, though I suspect it is so, if naming a custom template follows the same convention. I have looked at dozens of examples and templates and though I didn't find it specifically referenced, all the examples seem to use underscore for spaces. I see spaces in the style manager but seems to be Template Groups rather than templates that contain them. All the templates seen to not use spaces as far as I can see.

Anyone have a definitive answer on this?

Use underscores instead of spaces with anything you call when coding.

you just have to create a new template and try changing the protocol, you will see the result... the protocol is integrated into the engine, so you can not make any error.