docs: update sample code in "Creating Core System Classes"

[webalchemist]

RouteCollection constructor parameters are out of date in the Creating Core System Classes docs. Minor point, but might save someone a few minutes working out what they should be.

Referenced in <#8204>

Checklist:

• Securely signed commits
• Component(s) with PHPDoc blocks, only if necessary or adds value
• Unit testing, with >80% coverage
• User guide updated
• Conforms to style guide

[kenjis]

Please fix the coding style.

   1) user_guide_src/source/extending/core_classes/002.php (spaces_inside_parentheses)
      ---------- begin diff ----------
--- /home/runner/work/CodeIgniter4/CodeIgniter4/user_guide_src/source/extending/core_classes/002.php
+++ /home/runner/work/CodeIgniter4/CodeIgniter4/user_guide_src/source/extending/core_classes/002.php
@@ -12,7 +12,7 @@
             return static::getSharedInstance('routes');
         }
 
-        return new \App\Libraries\RouteCollection(static::locator(), config(Modules::class), config(Routing::class) );
+        return new \App\Libraries\RouteCollection(static::locator(), config(Modules::class), config(Routing::class));
     }
 
     // ...

      ----------- end diff -----------


Found 1 of 1543 files that can be fixed in 4.749 seconds, 32.000 MB memory used

https://github.com/codeigniter4/CodeIgniter4/actions/runs/6858254373/job/18648874735?pr=8205

[kenjis]

Can you fix the coding style?