cleanup

ghostcell/examples/dlist_arena.rs

@@ -5,11 +5,9 @@ use std::{fmt, thread, time};
 use typed_arena::Arena as TypedArena;
 
 fn print_list<'arena, 'id, T: fmt::Debug>(tag : char, list: NodeRef<'arena, 'id, T>, token: &GhostToken<'id>) {
-    print!("[");
     for d in Node::iter(list, token) {
         print!("{}{:?}, ", tag, d);
     }
-    print!("]");
 }
 
 fn main() {