fix JsonEditingTest: don't autoinsert comma if there's no value

json/src/com/intellij/json/editor/JsonEnterHandler.java

@@ -66,7 +66,7 @@ public class JsonEnterHandler extends EnterHandlerDelegateAdapter {
         prevSibling = prevSibling.getPrevSibling();
       }
 
-      if (prevSibling instanceof JsonProperty) {
+      if (prevSibling instanceof JsonProperty && ((JsonProperty)prevSibling).getValue() != null) {
         int offset = elementType == JsonElementTypes.COMMA ? nextSibling.getTextRange().getEndOffset() : prevSibling.getTextRange().getEndOffset();
         if (elementType == JsonElementTypes.R_CURLY) {
           editor.getDocument().insertString(offset, ",");

json/tests/testData/editing/NormalIndentAfterPropertyWithoutComma.after.json

@@ -1,6 +1,6 @@
 {
   "vcs": {
     "schema": "schema://foo.bar/path"
-  }
+  },
   <caret>
 }