[guide] Update syntax in eol-last examples

Author: spen

README.md

@@ -2115,24 +2115,24 @@ Other Style Guides
 
     ```javascript
     // bad
-    (function (global) {
-      // ...stuff...
-    })(this);
+    import { es6 } from './AirbnbStyleGuide';
+      // ...
+    export default es6;
     ```
 
     ```javascript
     // bad
-    (function (global) {
-      // ...stuff...
-    })(this);↵
+    import { es6 } from './AirbnbStyleGuide';
+      // ...
+    export default es6;↵
     ↵
     ```
 
     ```javascript
     // good
-    (function (global) {
-      // ...stuff...
-    })(this);↵
+    import { es6 } from './AirbnbStyleGuide';
+      // ...
+    export default es6;↵
     ```
 
   <a name="whitespace--chains"></a><a name="18.6"></a>