Fix issue #5780

Author: leonluocheng

modules/swagger-codegen/src/main/resources/htmlDocs2/index.mustache

@@ -346,7 +346,7 @@
                                         if (schema.$ref != null) {
                                           schema = defsParser.$refs.get(schema.$ref);
                                         } else {
-                                          schemaWrapper.definitions = Object.assign({}, defs);
+                                          schemaWrapper.definitions = defs;
                                           $RefParser.dereference(schemaWrapper).catch(function(err) {
                                             console.log(err);
                                           });
@@ -434,7 +434,7 @@
   {{>js_webfontloader}}
   <script>
     var schemaWrapper = {};
-    schemaWrapper.definitions = Object.assign({}, defs);
+    schemaWrapper.definitions = defs;
     defsParser = new $RefParser();
     defsParser.dereference(schemaWrapper).catch(function(err) {
       console.log(err);