Merge pull request #356 from tomgco/patch-1

Be consistent with quotes in examples.

Author: phillipj

locale/en/about/index.md

@@ -16,7 +16,7 @@ var http = require('http');
 http.createServer(function (req, res) {
   res.writeHead(200, {'Content-Type': 'text/plain'});
   res.end('Hello World\n');
-}).listen(1337, "127.0.0.1");
+}).listen(1337, '127.0.0.1');
 
 console.log('Server running at http://127.0.0.1:1337/');
 ```