[development] coding standard question

[Steve Rude]

So I was trying to research a coding standard that I don't see 
documented anywhere. 

What is the standard about NULL, TRUE and FALSE.  According to the coder 
module it says to use lowercase because it is faster, but throughout 
core there is uppercase.


e.g. in the system.module (not to mention the trailing comma is missing...)

/**
 * Implementation of hook_menu().
 */
function system_menu($may_cache) {
  $items = array();

  if ($may_cache) {
    $items[] = array('path' => 'system/files', 'title' => t('File 
download'),
      'callback' => 'file_download',
      'access' => TRUE,
      'type' => MENU_CALLBACK);

I know this is a very minor point, but we are trying to match our 
internal coding standards with that of Drupal.

Thanks!

Steve Rude