Define what happens when a list is passed into a function

[StealthHydra179]

Unless I missed it, it isn't defined what happens when a list is passed into a function. From Burlap I infer that a copy is made and not a reference to the list, but it may be beneficial to specify in the specification.

[Bigjango13]

I think for all values a copy is made (or at least, that's how burlap does it). A reference would be a good idea, although seems weird to have it just for lists (along with being a possible footgun if it's implicit). Maybe new syntax (like &foo) could be added? But I don't think Nobody would like it.