Update coding style guidelines for function arguments

Clarified guidelines on function arguments and array usage.

Author: traviswindsormoodle

general/development/policies/codingstyle/index.md

@@ -1161,20 +1161,24 @@ Magic methods are heavily discouraged, justification will be required when used.
 
 ### Using arrays for options as arguments
 
-All arguments to a function should be explicitly listed out and defined with a type. Using arrays like this can result in error as the types are not enforced as well as leading to poor documentation of the function
+All arguments to a function should be explicitly listed out and defined with a type. Using arrays like this can result in error as the types are not enforced as well as leading to poor documentation of the function.
 
 <InvalidExample>
+
 ```php
-    public function badfunction(
-        string $text,
-        context $context = null,
-        array $options = [],
-    ): string;
-```    
+public function badfunction(
+    string $text,
+    context $context = null,
+    array $options = [],
+): string;
+```
+
 </InvalidExample>
 
 If arguments are optional, then they should be marked appropriately as optional with a default value. 
+
 <ValidExample>
+    
 ```php
     function goodfunction(
         string $text,
@@ -1189,6 +1193,7 @@ If arguments are optional, then they should be marked appropriately as optional
         bool $allowid = false,
     ): string;
 ```
+
 </ValidExample>
 
 If there was a very good reason, then the use of an array could be considered. But it is strongly encouraged that all parameters be explict and typed.