Double quotes

Signed-off-by: Fabio José <[email protected]>

Author: fabiojose

examples/express-ex/index.js

@@ -41,5 +41,5 @@ app.post('/', function (req, res) {
 });
 
 app.listen(3000, function () {
-  console.log('Example app listening on port 3000!');
+  console.log("Example app listening on port 3000!");
 });