Adjust example directory structure authentication (#13805)

* Adjust example directory structure authentication

The registration directory should be inside the templates directory, but that's not reflected in the example. Visually it looked like registration should be placed in the Django project folder directly (which is not the case).
Since I think the original quote should be kept, I propose to add a few non-breaking space HTML entities to signify the correct place of the registration directory.

* Reformat to code block

Co-authored-by: Hamish Willee <hamishwillee@gmail.com>

files/en-us/learn/server-side/django/authentication/index.md

@@ -179,13 +179,16 @@ The URLs (and implicitly, views) that we just added expect to find their associa
 For this site, we'll put our HTML pages in the **templates/registration/** directory. This directory should be in your project root directory, i.e the same directory as the **catalog** and **locallibrary** folders. Please create these folders now.
 
 > **Note:** Your folder structure should now look like the below:
-> locallibrary (Django project folder) \
-> \\_catalog \
-> \\_locallibrary \
-> \\_templates **(new)** \
-> \\_registration
+> ```
+> locallibrary/   #Django project folder
+>   catalog/
+>   locallibrary/
+>   templates/
+>     registration/
+> ```
 
-To make the **templates** directory visible to the template loader we need to add it in the template search path. Open the project settings (**/locallibrary/locallibrary/settings.py**).
+To make the **templates** directory visible to the template loader we need to add it in the template search path.
+Open the project settings (**/locallibrary/locallibrary/settings.py**).
 
 Then import the `os` module (add the following line near the top of the file).