Index: wp-admin/load-scripts.php
===================================================================
--- wp-admin/load-scripts.php	(revision 22524)
+++ wp-admin/load-scripts.php	(working copy)
@@ -125,7 +125,7 @@
 
 $compress = ( isset($_GET['c']) && $_GET['c'] );
 $force_gzip = ( $compress && 'gzip' == $_GET['c'] );
-$expires_offset = 31536000;
+$expires_offset = 31536000; // 1 year
 $out = '';
 
 $wp_scripts = new WP_Scripts();
Index: wp-admin/load-styles.php
===================================================================
--- wp-admin/load-styles.php	(revision 22524)
+++ wp-admin/load-styles.php	(working copy)
@@ -104,7 +104,7 @@
 $compress = ( isset($_GET['c']) && $_GET['c'] );
 $force_gzip = ( $compress && 'gzip' == $_GET['c'] );
 $rtl = ( isset($_GET['dir']) && 'rtl' == $_GET['dir'] );
-$expires_offset = 31536000;
+$expires_offset = 31536000; // 1 year
 $out = '';
 
 $wp_styles = new WP_Styles();
Index: wp-includes/default-constants.php
===================================================================
--- wp-includes/default-constants.php	(revision 22524)
+++ wp-includes/default-constants.php	(working copy)
@@ -73,7 +73,7 @@
 	if ( !defined('SHORTINIT') )
 		define('SHORTINIT', false);
 
-	// Constants for expressing human-interval intervals
+	// Constants for expressing human-readable intervals
 	// in their respective number of seconds.
  	define( 'MINUTE_IN_SECONDS', 60 );
  	define( 'HOUR_IN_SECONDS',   60 * MINUTE_IN_SECONDS );
Index: wp-includes/js/tinymce/wp-tinymce.php
===================================================================
--- wp-includes/js/tinymce/wp-tinymce.php	(revision 22524)
+++ wp-includes/js/tinymce/wp-tinymce.php	(working copy)
@@ -19,7 +19,7 @@
 	return @file_get_contents($path);
 }
 
-$expires_offset = 31536000;
+$expires_offset = 31536000; // 1 year
 
 header('Content-Type: application/x-javascript; charset=UTF-8');
 header('Vary: Accept-Encoding'); // Handle proxies