Nonbreaking space in template leads to hard-to-understand error message

Explain the problem

When there is a nonbreaking space (unicode character code 160) in a template, the Melody parser will output an "Unknown token" error message. In the console, this usually looks like a normal space, this is why it's confusing.

Expected Behaviour

It might be good to test explicitly for the nonbreaking space, and inform the developer-user of it.

Actual Behaviour

"Unknown token" with the arrow pointing to what looks like a normal space.

Steps to reproduce

Insert a nonbreaking space in any template and try to compile it.

Provide a repository that reproduces issue if possible

Provide your Environment details

• Node version:

• Operating System:

• melody version: