5high on "How can I add target="_blank" for the WordPress credits in 2011 Theme?"

Hi,

I've searched the codex and the forums and surprisingly have found nothing about this!

What I'd like to do is to get the WordPress credits link to open in a new tab - pretty standard practice I believe, when clicking a link to a different site. However all I've found is info about removing/disabling it! I presume I'd put in something like: target="_blank" though I've read that it's not valid now??

The only place I can find to put it in the Twenty Eleven theme is in the Footer.php file, in the code below:

<div id="site-generator">
				<?php do_action( 'twentyeleven_credits' ); ?>
				<a href="<?php echo esc_url( __( 'http://wordpress.org/', 'twentyeleven' ) ); ?>" title="<?php esc_attr_e( 'Semantic Personal Publishing Platform', 'twentyeleven' ); ?>"><?php printf( __( 'Proudly powered by %s', 'twentyeleven' ), 'WordPress' ); ?></a>
			</div>

but I'm not sure how to add it into a php file (only in html).
I already have a child theme with a functions.php file (though nothing in it as yet!), but I'm at a complete loss as to how to do this probably very simple thing!
I did have a go, and tried it here...

<div id="site-generator">
				<?php do_action( 'twentyeleven_credits' ); ?>
				<a href="<?php echo esc_url( __( 'http://wordpress.org/', 'twentyeleven', target="_blank" ) ); ?>" title="<?php esc_attr_e( 'Semantic Personal Publishing Platform', 'twentyeleven' ); ?>"><?php printf( __( 'Proudly powered by %s', 'twentyeleven' ), 'WordPress' ); ?></a>
			</div>

but it must have broken it totally as I ended up with no footer at all!

So any help would be greatly appreciated - and I'm sure it would be something that others are possibly interested in too...

Thanks in advance.