thing.appearance = otherthing.appearance doesn't copy name and desc

[amylizzle]

/obj/thingtocopy
    name = "hello"
    desc = "this is a thing"

/proc/test()
    var/obj/thingtocopy/T = new()
    var/obj/otherthing = new()
    otherthing.appearance = T.appearance
    ASSERT(otherthing.name == T.name)
    ASSERT(otherthing.desc == T.desc)

There's probably some other things that are copied in appearance assignments like this that we've missed too.