fix bug in rest with error on empty list

prelude.ld

@@ -134,6 +134,8 @@ fn fn? {
 & what we need for some very basic list manipulation 
 fn rest {
 	"Returns all but the first element of a list or tuple, as a list."
+	([]) -> []
+	(()) -> ()
 	(xs as :list) -> base :rest (xs)
 	(xs as :tuple) -> base :rest (xs)
 }

src/ludus.janet

@@ -52,11 +52,7 @@
 (comment
 # (do
 (def source `
-hideturtle! ()
-showturtle! ()
-penup! ()
-pendown! ()
-pencolor! (colors :red)
+rest ([])
 `)
 (def out (-> source 
  ludus