clean code

lib/models/page.js

@@ -489,8 +489,8 @@ module.exports = function(crowi) {
 
   // find page and check if granted user
   pageSchema.statics.findPage = function(path, userData, revisionId, ignoreNotFound) {
-    var self = this;
-    var PageGroupRelation = crowi.model('PageGroupRelation');
+    const self = this;
+    const PageGroupRelation = crowi.model('PageGroupRelation');
 
     return new Promise(function(resolve, reject) {
       self.findOne({path: path}, function(err, pageData) {
@@ -503,7 +503,7 @@ module.exports = function(crowi) {
             return resolve(null);
           }
 
-          var pageNotFoundError = new Error('Page Not Found');
+          const pageNotFoundError = new Error('Page Not Found');
           pageNotFoundError.name = 'Crowi:Page:NotFound';
           return reject(pageNotFoundError);
         }