Simplify

src/lib/template/dom-repeat.html

@@ -394,7 +394,7 @@ Then the `observe` property should be configured as follows:
       var c = this.collection;
       // Choose rendering path: full vs. incremental using splices
       if (this._needFullRefresh) {
-        // Full refresh when items, sort, filter change or render() called
+        // Full refresh when items, sort, or filter change, or when render() called
         this._applyFullRefresh();
         this._needFullRefresh = false;
       } else if (this._keySplices.length) {
@@ -652,8 +652,7 @@ Then the `observe` property should be configured as follows:
       };
       model[this.as] = this.collection.getItem(key);
       model[this.indexAs] = idx;
-      var inst = this.stamp(model);
-      return inst;
+      return this.stamp(model);
     },
 
     _upgradePlaceholder: function(idx, key) {