Merge pull request #3274 from Alkebsi/patch-3

Edited a minor thing in part4a.md

Author: mluukkai

src/content/4/en/part4a.md

@@ -173,7 +173,7 @@ module.exports = notesRouter
 
 The module exports the router to be available for all consumers of the module.
 
-All routes are now defined for the router object, similar to what I did before with the object representing the entire application.
+All routes are now defined for the router object, similar to what was done before with the object representing the entire application.
 
 It's worth noting that the paths in the route handlers have shortened. In the previous version, we had: