fix silly bugs in binary_search_util test

Author: nikomatsakis

src/librustc_data_structures/binary_search_util/test.rs

@@ -4,15 +4,16 @@ type Element = (usize, &'static str);
 
 fn test_map() -> Vec<Element> {
     let mut data = vec![(3, "three-a"), (0, "zero"), (3, "three-b"), (22, "twenty-two")];
-    data.sort_by_key(get_key)
+    data.sort_by_key(get_key);
+    data
 }
 
 fn get_key(data: &Element) -> usize {
     data.0
 }
 
 #[test]
-fn binary_search_slice() {
+fn binary_search_slice_test() {
     let map = test_map();
     assert_eq!(binary_search_slice(&map, get_key, &0), &[(0, "zero")]);
     assert_eq!(binary_search_slice(&map, get_key, &1), &[]);