These are arbitrary distinctions; as Heidegger said, language is language. As long as they're Turing complete, the only difference between "programming" and "templating" (and "natural") languages are what they're used/optimized for.

Element A containing Element B can be generated by function A taking Element B.

The CoffeScript program converts a set syntax/grammar into JavaScript; but the syntax is just syntax, and its clean, smart design lends itself well for compiling code other than JavaScript, just as JSON is a useful serialization format in other langs. There are benefits in using the same syntax for representing structure, content, and presentation, as long as the concerns are still properly separated.