docs: small improvement in debugging

Author: kenjis

user_guide_src/source/testing/debugging.rst

@@ -19,7 +19,7 @@ and much, much more.
 Enabling Kint
 =============
 
-By default, Kint is enabled in **development** and **testing** environments only. This can be altered by modifying
+By default, Kint is enabled in **development** and **testing** :doc:`environments </general/environments>` only. This can be altered by modifying
 the ``$useKint`` value in the environment configuration section of the main **index.php** file::
 
     $useKint = true;
@@ -59,7 +59,7 @@ to help you debug and optimize.
 Enabling the Toolbar
 ====================
 
-The toolbar is enabled by default in any environment *except* production. It will be shown whenever the
+The toolbar is enabled by default in any :doc:`environment </general/environments>` *except* **production**. It will be shown whenever the
 constant CI_DEBUG is defined and its value is truthy. This is defined in the boot files (e.g.
 **app/Config/Boot/development.php**) and can be modified there to determine what environment to show.