docs: improve readability on if-else statement

closes #140

README.md

@@ -157,7 +157,7 @@ var corsOptionsDelegate = function (req, callback) {
   var corsOptions;
   if (whitelist.indexOf(req.header('Origin')) !== -1) {
     corsOptions = { origin: true } // reflect (enable) the requested origin in the CORS response
-  }else{
+  } else {
     corsOptions = { origin: false } // disable CORS for this request
   }
   callback(null, corsOptions) // callback expects two parameters: error and options