fix(jqLite): prepend array in correct order

Match jQuery behavior when prepending array into empty element

src/jqLite.js

@@ -715,12 +715,7 @@ forEach({
     if (element.nodeType === 1) {
       var index = element.firstChild;
       forEach(new JQLite(node), function(child){
-        if (index) {
+        element.insertBefore(child, index);
-          element.insertBefore(child, index);
-        } else {
-          element.appendChild(child);
-          index = child;
-        }
       });
     }
   },

test/jqLiteSpec.js

@@ -1075,6 +1075,18 @@ describe('jqLite', function() {
       expect(root.prepend('abc')).toEqual(root);
       expect(root.html().toLowerCase()).toEqual('abctext');
     });
+    it('should prepend array to empty in the right order', function() {
+      var root = jqLite('<div>');
+      expect(root.prepend([a, b, c])).toBe(root);
+      expect(sortedHtml(root)).
+        toBe('<div><div>A</div><div>B</div><div>C</div></div>');
+    });
+    it('should prepend array to content in the right order', function() {
+      var root = jqLite('<div>text</div>');
+      expect(root.prepend([a, b, c])).toBe(root);
+      expect(sortedHtml(root)).
+        toBe('<div><div>A</div><div>B</div><div>C</div>text</div>');
+    });
   });