fix js format

static/src/js/app/admin/problem/edit_problem.js

@@ -2,7 +2,8 @@ require(["jquery", "avalon", "editor", "uploader", "bsAlert", "csrfToken", "tagE
     function ($, avalon, editor, uploader, bsAlert, csrfTokenHeader) {
 
         avalon.ready(function () {
-            avalon.vmodels.editProblem = null;
+
+
 
             $("#edit-problem-form").validator()
                 .on('submit', function (e) {
@@ -76,6 +77,10 @@ require(["jquery", "avalon", "editor", "uploader", "bsAlert", "csrfToken", "tagE
                     }
                 });
 
+            if(avalon.vmodels.editProblem){
+                var vm = avalon.vmodels.editProblem;
+            }
+            else {
                 var vm = avalon.define({
                     $id: "editProblem",
                     title: "",
@@ -108,10 +113,12 @@ require(["jquery", "avalon", "editor", "uploader", "bsAlert", "csrfToken", "tagE
                             return "折叠";
                         return "展开";
                     },
-                showProblemListPage: function(){
+                    showProblemListPage: function () {
                         vm.$fire("up!showProblemListPage");
                     }
                 });
+
+            }
             var hintEditor = editor("#hint");
             var descriptionEditor = editor("#problemDescription");
             var testCaseUploader = uploader("#testCaseFile", "/api/admin/test_case_upload/", function (file, response) {