Improving hook_default_message_type documentation

Author: wundo

message.api.php

@@ -73,7 +73,20 @@ function hook_message_view_alter(&$build) {
  */
 function hook_default_message_type() {
   $defaults['main'] = entity_create('message_type', array(
+    'description' => 'Type description',
+    'argument_keys' => array(
+      '!teaser',
+      '!body',
+      '@string',
+    ),
+    'message_text' => array(
+      LANGUAGE_NONE => array(
+        array('value' => 'Example text.'),
+      ),
+    ),
+    'language' => 'en',
   ));
+
   return $defaults;
 }
 
@@ -135,4 +148,4 @@ function hook_default_message_type_category_alter(array &$defaults) {
 
 /**
  * @} End of "addtogroup hooks".
- */
+ */