:memo: Match variable names

[ci skip]

docs/api/native-image.md

@@ -10,7 +10,7 @@ image file path as a `String`:
 
 ```javascript
 const appIcon = new Tray('/Users/somebody/images/icon.png');
-let window = new BrowserWindow({icon: '/Users/somebody/images/window.png'});
+let win = new BrowserWindow({icon: '/Users/somebody/images/window.png'});
 ```
 
 Or read the image from the clipboard which returns a `nativeImage`:

docs/api/synopsis.md

@@ -21,11 +21,11 @@ The main process script is just like a normal Node.js script:
 ```javascript
 const {app, BrowserWindow} = require('electron');
 
-let window = null;
+let win = null;
 
 app.on('ready', () => {
-  window = new BrowserWindow({width: 800, height: 600});
-  window.loadURL('https://github.com');
+  win = new BrowserWindow({width: 800, height: 600});
+  win.loadURL('https://github.com');
 });
 ```
 

docs/tutorial/desktop-environment-integration.md

@@ -267,8 +267,8 @@ To set the progress bar for a Window, you can use the
 [BrowserWindow.setProgressBar][setprogressbar] API:
 
 ```javascript
-let window = new BrowserWindow({...});
-window.setProgressBar(0.5);
+let win = new BrowserWindow({...});
+win.setProgressBar(0.5);
 ```
 
 ## Icon Overlays in Taskbar (Windows)
@@ -294,8 +294,8 @@ To set the overlay icon for a window, you can use the
 [BrowserWindow.setOverlayIcon][setoverlayicon] API:
 
 ```javascript
-let window = new BrowserWindow({...});
-window.setOverlayIcon('path/to/overlay.png', 'Description for overlay');
+let win = new BrowserWindow({...});
+win.setOverlayIcon('path/to/overlay.png', 'Description for overlay');
 ```
 
 ## Represented File of Window (OS X)
@@ -316,9 +316,9 @@ To set the represented file of window, you can use the
 [BrowserWindow.setDocumentEdited][setdocumentedited] APIs:
 
 ```javascript
-let window = new BrowserWindow({...});
-window.setRepresentedFilename('/etc/passwd');
-window.setDocumentEdited(true);
+let win = new BrowserWindow({...});
+win.setRepresentedFilename('/etc/passwd');
+win.setDocumentEdited(true);
 ```
 
 [addrecentdocument]: ../api/app.md#appaddrecentdocumentpath-os-x-windows