Index: wp-admin/includes/class-wp-users-list-table.php
===================================================================
--- wp-admin/includes/class-wp-users-list-table.php	(revision 26851)
+++ wp-admin/includes/class-wp-users-list-table.php	(working copy)
@@ -148,6 +148,11 @@
 			submit_button( __( 'Change' ), 'button', 'changeit', false );
 		endif;
 
+		/**
+		 * Triggered after the extra tablenav on the user list page
+		 *
+		 * @since 3.5.0
+		 */
 		do_action( 'restrict_manage_users' );
 		echo '</div>';
 	}
@@ -257,6 +262,13 @@
 				$actions['delete'] = "<a class='submitdelete' href='" . wp_nonce_url( "users.php?action=delete&amp;user=$user_object->ID", 'bulk-users' ) . "'>" . __( 'Delete' ) . "</a>";
 			if ( is_multisite() && get_current_user_id() != $user_object->ID && current_user_can( 'remove_user', $user_object->ID ) )
 				$actions['remove'] = "<a class='submitdelete' href='" . wp_nonce_url( $url."action=remove&amp;user=$user_object->ID", 'bulk-users' ) . "'>" . __( 'Remove' ) . "</a>";
+			/**
+			 * The actions available against a user.
+			 *
+			 * @since 3.1.0
+			 * @var   array $actions Array of actions available
+			 * @var   WP_User $user_object The user object being listed.
+			 */
 			$actions = apply_filters( 'user_row_actions', $actions, $user_object );
 			$edit .= $this->row_actions( $actions );
 
@@ -313,6 +325,14 @@
 					break;
 				default:
 					$r .= "<td $attributes>";
+					/**
+					 * Provide output for a custom column on the users list table.
+					 *
+					 * @since 3.1.0
+					 * @var   string The current content for the column.
+					 * @var   string The column being rendered.
+					 * @var   int    The user ID being rendered.
+					 */
 					$r .= apply_filters( 'manage_users_custom_column', '', $column_name, $user_object->ID );
 					$r .= "</td>";
 			}