Fix lint errors.

src/engine/runtime.js

@@ -551,11 +551,11 @@ class Runtime extends EventEmitter {
      */
     _buildMenuForScratchBlocks (menuName, menuItems, categoryInfo) {
         const menuId = this._makeExtensionMenuId(menuName, categoryInfo.id);
-        var options = null;
+        let options = null;
         if (typeof menuItems === 'function') {
-             options = function () {
+            options = function () {
                 return menuItems();
-            }
+            };
         } else {
             options = menuItems.map(item => {
                 switch (typeof item) {

src/extension-support/extension-manager.js

@@ -250,22 +250,22 @@ class ExtensionManager {
     /**
      * Prepare extension menus. e.g. setup binding for dynamic menu functions.
      * @param {string} serviceName - the name of the service hosting this extension block
-     * @param {Array.<MenuInfo>} menuInfo - the menu defined by the extension.
+     * @param {Array.<MenuInfo>} menus - the menu defined by the extension.
      * @returns {Array.<MenuInfo>} - a menuInfo object with all preprocessing done.
      * @private
      */
     _prepareMenuInfo (serviceName, menus) {
-        var menuNames = Object.getOwnPropertyNames(menus);
+        const menuNames = Object.getOwnPropertyNames(menus);
         for (let i = 0; i < menuNames.length; i++) {
-            var item = menuNames[i];
+            const item = menuNames[i];
             // If the value is a string, it should be the name of a function in the
             // extension object to call to populate the menu whenever it is opened.
             // Set up the binding for the function object here so
             // we can use it later when converting the menu for Scratch Blocks.
             if (typeof menus[item] === 'string') {
-              const serviceObject = dispatch.services[serviceName];
-              const menuFunc = serviceObject[menus[item]].bind(serviceObject);
-              menus[item] = menuFunc;
+                const serviceObject = dispatch.services[serviceName];
+                const menuFunc = serviceObject[menus[item]].bind(serviceObject);
+                menus[item] = menuFunc;
             }
         }
         return menus;

test/integration/internal-extension.js

@@ -25,7 +25,7 @@ class TestInternalExtension {
             ],
             menus: {
                 simpleMenu: this._buildAMenu(),
-                dynamicMenu: '_buildDynamicMenu',
+                dynamicMenu: '_buildDynamicMenu'
             }
         };
     }
@@ -34,12 +34,12 @@ class TestInternalExtension {
         this.status.goCalled = true;
     }
 
-    _buildAMenu() {
+    _buildAMenu () {
         this.status.buildMenuCalled = true;
         return ['abcd', 'efgh', 'ijkl'];
     }
 
-    _buildDynamicMenu() {
+    _buildDynamicMenu () {
         this.status.buildDynamicMenuCalled = true;
         return [1, 2, 3, 4, 6];
     }