CIF '@doc' annotation arguments could get reordered, according to rules for unnamed CIF annotation arguments

The CIF language reference manual states: "The order of the arguments of an annotation is not relevant. That is, if the arguments are re-ordered, then the annotation still has the same meaning."

However, for the @doc annotation, this is undesired. If we have @doc("First line.", "Second line.", "Third line."), then we don't want these to get re-ordered.