SVN revision in WP admin footer version

gistfile1.aw

<?php

function core_svn_update_footer( $msg = '' ) {
	if ( !current_user_can('update_core') )
		return $msg;

	$cur = get_preferred_from_update_core();

	if ( ! isset( $cur->response ) )
		$cur->response = '';

	if ( 'development' == $cur->response && file_exists( ABSPATH . '.svn' ) ) {
		if ( file_exists( ABSPATH . '.svn/entries' ) && $svn = file( ABSPATH . '.svn/entries' ) )
			return sprintf( __( 'You are using a development version (r%1$d) under SVN. Cool!', 'foo' ), $svn[3] );
		else
			return sprintf( __( 'You are using a development version (%1$s) under SVN. Cool!', 'foo' ), $GLOBALS['wp_version'] );
	}
	else
		return $msg;
}
add_filter( 'update_footer', 'core_svn_update_footer', 11 );