Functions don't understand JSON with line breaks

This function works as intended:

title @a {text: "Hello, World!"}

This function does not:

title @a {
  text: "Hello, World!"
}

Additionally, the failing function simply throws the error "Unknown function", which is cryptic and unhelpful – it would be much easier to debug problems of this type if there was a different error for "function not found" and "function did not parse correctly."