diff --git a/src/node/hooks/express/importexport.js b/src/node/hooks/express/importexport.js
index 7a6c38655..4dbe816f6 100644
--- a/src/node/hooks/express/importexport.js
+++ b/src/node/hooks/express/importexport.js
@@ -1,39 +1,43 @@
-const assert = require('assert').strict;
+'use strict';
+
 const hasPadAccess = require('../../padaccess');
 const settings = require('../../utils/Settings');
 const exportHandler = require('../../handler/ExportHandler');
 const importHandler = require('../../handler/ImportHandler');
 const padManager = require('../../db/PadManager');
 const readOnlyManager = require('../../db/ReadOnlyManager');
-const authorManager = require('../../db/AuthorManager');
 const rateLimit = require('express-rate-limit');
 const securityManager = require('../../db/SecurityManager');
 const webaccess = require('./webaccess');
 
-settings.importExportRateLimiting.onLimitReached = function (req, res, options) {
+settings.importExportRateLimiting.onLimitReached = (req, res, options) => {
   // when the rate limiter triggers, write a warning in the logs
-  console.warn(`Import/Export rate limiter triggered on "${req.originalUrl}" for IP address ${req.ip}`);
+  console.warn('Import/Export rate limiter triggered on ' +
+      `"${req.originalUrl}" for IP address ${req.ip}`);
 };
 
 const limiter = rateLimit(settings.importExportRateLimiting);
 
-exports.expressCreateServer = function (hook_name, args, cb) {
+exports.expressCreateServer = (hookName, args, cb) => {
   // handle export requests
   args.app.use('/p/:pad/:rev?/export/:type', limiter);
   args.app.get('/p/:pad/:rev?/export/:type', async (req, res, next) => {
     const types = ['pdf', 'doc', 'txt', 'html', 'odt', 'etherpad'];
     // send a 404 if we don't support this filetype
-    if (types.indexOf(req.params.type) == -1) {
+    if (types.indexOf(req.params.type) === -1) {
       return next();
     }
 
     // if abiword is disabled, and this is a format we only support with abiword, output a message
-    if (settings.exportAvailable() == 'no' &&
+    if (settings.exportAvailable() === 'no' &&
        ['odt', 'pdf', 'doc'].indexOf(req.params.type) !== -1) {
-      console.error(`Impossible to export pad "${req.params.pad}" in ${req.params.type} format. There is no converter configured`);
+      console.error(`Impossible to export pad "${req.params.pad}" in ${req.params.type} format.` +
+          ' There is no converter configured');
 
-      // ACHTUNG: do not include req.params.type in res.send() because there is no HTML escaping and it would lead to an XSS
-      res.send('This export is not enabled at this Etherpad instance. Set the path to Abiword or soffice (LibreOffice) in settings.json to enable this feature');
+      // ACHTUNG: do not include req.params.type in res.send() because there is
+      // no HTML escaping and it would lead to an XSS
+      res.send('This export is not enabled at this Etherpad instance. Set the path to Abiword' +
+          ' or soffice (LibreOffice) in settings.json to enable this feature');
       return;
     }