Fix datacontext not added to mvvmlight pages

code/src/Core/PostActions/Catalog/Merge/IEnumerableExtensions.cs

@@ -9,8 +9,8 @@ namespace Microsoft.Templates.Core.PostActions.Catalog.Merge
     public static class IEnumerableExtensions
     {
         private const string MacroBeforeMode = "^^";
-        private const string MacroStartGroup = "{{";
-        private const string MarcoEndGroup = "}}";
+        private const string MacroStartGroup = "{[{";
+        private const string MarcoEndGroup = "}]}";
 
         public static int SafeIndexOf(this IEnumerable<string> source, string item, int skip)
         {

code/test/Core.Test/TestData/Merge/Source_postaction.cs

@@ -22,12 +22,12 @@ namespace App38
             var s = "";
         }
 
-        //{{
+        //{[{
         private static void ThisIsANewMethod()
         {
             //INSIDE NEW METHOD!!
         }
-        //}}
+        //}]}
 
         protected override void OnActivated(IActivatedEventArgs args)
         {

templates/Frameworks/MVVMLight/Templates/Page/uct.ItemName/uct.ItemNamePage_postaction.xaml

@@ -1,5 +1,5 @@
 <Page
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-    DataContext={Binding uct.ItemNameViewModel, Source={StaticResource Locator}}
+    DataContext="{Binding uct.ItemNameViewModel, Source={StaticResource Locator}}"
     mc:Ignorable="d">
 </Page>