Index: wp-admin/includes/misc.php
===================================================================
--- wp-admin/includes/misc.php	(revision 26246)
+++ wp-admin/includes/misc.php	(working copy)
@@ -330,6 +330,14 @@
 
 	$functions = array_unique( $functions );
 	sort( $functions );
+        /**
+         * Filter the array of functions/classes that should be ignored from
+         * the documentation lookup.
+         *
+         * @since 2.8.0
+         *
+         * @param array $ignore_functions Functions/Classes to be ignored.
+         */
 	$ignore_functions = apply_filters( 'documentation_ignore_functions', $ignore_functions );
 	$ignore_functions = array_unique( $ignore_functions );
 
@@ -390,6 +398,15 @@
 					return;
 				break;
 			default:
+                                /**
+                                 * Filters the number of rows value for custom item listing.
+                                 *
+                                 * @since 2.8.0
+                                 *
+                                 * @param bool/int $value  The number of rows value.
+                                 * @param string   $option The option name.
+                                 * @param int      $value  The actual number of rows value.
+                                 */
 				$value = apply_filters('set-screen-option', false, $option, $value);
 				if ( false === $value )
 					return;