📝 Fix code style issue

* Change `var` to `let`.
* Change `function() {}` to `() => {}`.
* Use shorthand function syntax on object notation.
* Remove spaces between object notation brackets.
* Small fixes.

docs/tutorial/application-packaging.md

@@ -85,7 +85,7 @@ For example, to get a file with `$.get`:
 
 ```html
 <script>
-var $ = require('./jquery.min.js');
+let $ = require('./jquery.min.js');
 $.get('file:///path/to/example.asar/file.txt', (data) => {
   console.log(data);
 });

docs/tutorial/desktop-environment-integration.md

@@ -22,7 +22,7 @@ let myNotification = new Notification('Title', {
   body: 'Lorem Ipsum Dolor Sit Amet'
 });
 
-myNotification.onclick = function () {
+myNotification.onclick = () => {
   console.log('Notification clicked');
 };
 ```
@@ -118,7 +118,7 @@ const app = electron.app;
 const Menu = electron.Menu;
 
 const dockMenu = Menu.buildFromTemplate([
-  { label: 'New Window', click: () => { console.log('New Window'); } },
+  { label: 'New Window', click() { console.log('New Window'); } },
   { label: 'New Window with Settings', submenu: [
     { label: 'Basic' },
     { label: 'Pro'}
@@ -221,13 +221,13 @@ win.setThumbarButtons([
   {
     tooltip: 'button1',
     icon: path.join(__dirname, 'button1.png'),
-    click: () => { console.log('button2 clicked'); }
+    click() { console.log('button2 clicked'); }
   },
   {
     tooltip: 'button2',
     icon: path.join(__dirname, 'button2.png'),
-    flags:['enabled', 'dismissonclick'],
-    click: () => { console.log('button2 clicked.'); }
+    flags: ['enabled', 'dismissonclick'],
+    click() { console.log('button2 clicked.'); }
   }
 ]);
 ```

docs/tutorial/quick-start.md

@@ -82,15 +82,15 @@ example being:
 ```javascript
 const electron = require('electron');
 // Module to control application life.
-const app = electron.app;
+const {app} = electron;
 // Module to create native browser window.
-const BrowserWindow = electron.BrowserWindow;
+const {BrowserWindow} = electron;
 
 // Keep a global reference of the window object, if you don't, the window will
 // be closed automatically when the JavaScript object is garbage collected.
 let mainWindow;
 
-function createWindow () {
+function createWindow() {
   // Create the browser window.
   mainWindow = new BrowserWindow({width: 800, height: 600});
 

docs/tutorial/using-selenium-and-webdriver.md

@@ -59,7 +59,7 @@ driver.get('http://www.google.com');
 driver.findElement(webdriver.By.name('q')).sendKeys('webdriver');
 driver.findElement(webdriver.By.name('btnG')).click();
 driver.wait(() => {
- return driver.getTitle().then(function(title) {
+ return driver.getTitle().then((title) => {
    return title === 'webdriver - Google Search';
  });
 }, 1000);
@@ -106,7 +106,7 @@ const options = {
   }
 };
 
-var client = webdriverio.remote(options);
+let client = webdriverio.remote(options);
 
 client
   .init()