Fix code block indentation and bracket use flagging Vale 🤓

docs/contacts/custom_fields.rst

@@ -109,18 +109,18 @@ To mitigate the table lock issue, run the command only once daily when you know
 Locally defined countries and regions
 *************************************
 
-Since Mautic 5.1 it's possible to define custom countries and regions via locally hosted JSON files. This is useful when you have a specific set of countries or regions that you want to use in your Mautic instance. You can define these in a file called ``countries.json`` or ``regions.json`` located in your defined ``upload_dir`` (``media/files`` by default). Example code snippets are below:
+Since Mautic 5.1 it's possible to define custom countries and regions via locally hosted JSON files. This is useful when you have a specific set of countries or regions that you want to use in your Mautic instance. You can define these in a file called ``countries.json`` or ``regions.json`` located in your defined ``upload_dir`` which is ``media/files`` by default. Example code snippets are below:
 
-.. code:: json
+.. code-block:: json
 
-[
+  [
   "Middle Earth",
   "Fillory"
-]
-
-.. code:: json
+  ]
 
-{
+.. code-block:: json
+  
+  {
   "Middle Earth": [
     "The Shire",
     "Mordor"
@@ -129,4 +129,4 @@ Since Mautic 5.1 it's possible to define custom countries and regions via locall
     "Castle Whitespire",
     "Ember's Tomb"
   ]
-}
+  }