Update general/development/policies/codingstyle/index.md

Co-authored-by: Andrew Lyons <[email protected]>

Author: traviswindsormoodle

general/development/policies/codingstyle/index.md

@@ -1166,7 +1166,7 @@ All arguments to a function should be explicitly listed out and defined with a t
 <InvalidExample>
 
 ```php
-public function badfunction(
+public function bad_function(
     string $text,
     ?context $context = null,
     array $options = [],