Update docs/api/app.md

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

Author: gaby

docs/api/app.md

@@ -585,13 +585,13 @@ func (app *App) RebuildTree() *App
 **NOTE**: This method should be used in the most careful way possible, since it's not currently possible to make it thread-safe (it would add a big performance overhead to do so) and calling it is very performance-intensive, so it's recommended to be used only in development mode and never concurrently. Here's an example of defining routes dynamically:
 
 ```go
-app.Get("/define", func(c Ctx) error {
-  app.Get("/dynamically-defined", func(c Ctx) error {
-  	return c.SendStatus(http.StatusOK)
-  })
+app.Get("/define", func(c Ctx) error {  // Define a new route dynamically
+    app.Get("/dynamically-defined", func(c Ctx) error {  // Adding a dynamically defined route
+        return c.SendStatus(http.StatusOK)
+    })
 
-  app.RebuildTree()
+    app.RebuildTree()  // Rebuild the route tree to register the new route
 
-  return c.SendStatus(http.StatusOK)
+    return c.SendStatus(http.StatusOK)
 })
 ```