add preventDefault support for all inital event types (show, close, hide, etc.) + fix small bug with scrollspy.last

js/tests/unit/bootstrap-tab.js

@@ -42,4 +42,20 @@ $(function () {
         equals($("#qunit-fixture").find('.active').attr('id'), "home")
       })
 
+
+      test("should not fire closed when close is prevented", function () {
+        $.support.transition = false
+        stop();
+        $('<div class="tab"/>')
+          .bind('show', function (e) {
+            e.preventDefault();
+            ok(true);
+            start();
+          })
+          .bind('shown', function () {
+            ok(false);
+          })
+          .tab('show')
+      })
+
 })