[ticket/11358] Fixed the code according to coding guidlines.

Added proper indentation and new line after break in switch
statement.

PHPBB3-11358

phpBB/includes/acp/acp_groups.php

@@ -141,8 +141,8 @@ class acp_groups
 						'action'	=> $action))
 					);
 				}
-
 			break;
+				
 			case 'set_default_on_all':
 				if (confirm_box(true))
 				{
@@ -192,6 +192,7 @@ class acp_groups
 					);
 				}
 			break;
+			
 			case 'deleteusers':
 				if (empty($mark_ary))
 				{