Fix syntax error to pass the test

index.js

@@ -1,14 +1,12 @@
 'use strict';
 var assert = require('assert');
 
-function HtmlWebpackExcludeAssetsPlugin(options) {
+function HtmlWebpackExcludeAssetsPlugin (options) {
   assert.equal(options, undefined, 'The HtmlWebpackExcludeAssetsPlugin does not accept any options');
   this.PluginName = 'HtmlWebpackExcludeAssetsPlugin';
 }
 
 HtmlWebpackExcludeAssetsPlugin.prototype.apply = function (compiler) {
-  var self = this;
-
   if ('hooks' in compiler) {
     // v4 approach:
     compiler.hooks.compilation.tap(this.PluginName, this.applyCompilation.bind(this));
@@ -19,19 +17,19 @@ HtmlWebpackExcludeAssetsPlugin.prototype.apply = function (compiler) {
   }
 };
 
-HtmlWebpackExcludeAssetsPlugin.prototype.applyCompilation = function applyCompilation(compilation) {
+HtmlWebpackExcludeAssetsPlugin.prototype.applyCompilation = function applyCompilation (compilation) {
   var self = this;
   if ('hooks' in compilation) {
     // If our target hook is not present, throw a descriptive error
-    if(!compilation.hooks.htmlWebpackPluginAlterAssetTags) {
+    if (!compilation.hooks.htmlWebpackPluginAlterAssetTags) {
       throw new Error('The expected HtmlWebpackPlugin hook was not found! Ensure HtmlWebpackPlugin is installed and' +
         ' was initialized before this plugin.');
     }
     compilation.hooks.htmlWebpackPluginAlterAssetTags.tapAsync(this.PluginName, registerCb);
   } else {
     compilation.plugin('html-webpack-plugin-alter-asset-tags', registerCb);
   }
-  function registerCb(htmlPluginData, callback) {
+  function registerCb (htmlPluginData, callback) {
     var excludeAssets = htmlPluginData.plugin.options.excludeAssets;
     // Skip if the plugin configuration didn't set `excludeAssets`
     if (!excludeAssets) {
@@ -58,7 +56,7 @@ HtmlWebpackExcludeAssetsPlugin.prototype.applyCompilation = function applyCompil
       return Promise.resolve(result);
     }
   }
-}
+};
 
 HtmlWebpackExcludeAssetsPlugin.prototype.isExcluded = function (excludePatterns, assetPath) {
   return excludePatterns.filter(function (excludePattern) {