fixing broken _.breakLoop test -- implementation was fine, test was out of date.

test/collections.js

@@ -8,7 +8,7 @@ $(document).ready(function() {
     });
 
     var answer = null;
-    _.each([1, 2, 3], function(num){ if ((answer = num) == 2) throw '__break__'; });
+    _.each([1, 2, 3], function(num){ if ((answer = num) == 2) _.breakLoop(); });
     equals(answer, 2, 'the loop broke in the middle');
 
     var answers = [];