auto merge of #13090 : thestinger/rust/iter, r=Aatch

This has been rendered obsolete by partial type hints. Since the `~[T]`
type is in the process of being removed, it needs to go away.

src/test/bench/shootout-binarytrees.rs

@@ -76,7 +76,7 @@ fn main() {
                 format!("{}\t trees of depth {}\t check: {}",
                         iterations * 2, depth, chk)
             })
-        }).to_owned_vec();
+        }).collect::<~[Future<~str>]>();
 
     for message in messages.mut_iter() {
         println!("{}", *message.get_ref());

src/test/run-pass/send_str_treemap.rs

@@ -62,7 +62,7 @@ pub fn main() {
 
     assert!(map.pop(&Slice("foo")).is_some());
     assert_eq!(map.move_iter().map(|(k, v)| k.to_str() + v.to_str())
-                              .to_owned_vec()
+                              .collect::<~[~str]>()
                               .concat(),
                ~"abc50bcd51cde52def53");
 }

src/test/run-pass/trait-to-str.rs

@@ -21,7 +21,7 @@ impl to_str for int {
 
 impl<T:to_str> to_str for Vec<T> {
     fn to_string(&self) -> ~str {
-        format!("[{}]", self.iter().map(|e| e.to_string()).to_owned_vec().connect(", "))
+        format!("[{}]", self.iter().map(|e| e.to_string()).collect::<~[~str]>().connect(", "))
     }
 }