minor fixes

Author: iliakan

1-js/13-modules/01-modules-intro/article.md

@@ -193,7 +193,7 @@ Here's the classical pattern:
 2. On the first import we initialize it, write to its properties. The top-level application script may do that.
 3. Further imports use the module.
 
-For instance, the `admin.js` module may provide certain functionality, but expect the credentials to come into the `config` object from outside:
+For instance, the `admin.js` module may provide certain functionality (e.g. authentication), but expect the credentials to come into the `config` object from outside:
 
 ```js
 // 📁 admin.js