Genesis - Theme Activation Welcome Message

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/** Autobahn theme activation welcome message */
add_action( 'admin_notices', 'autobahn_child_theme_welcome', 11 );
function autobahn_child_theme_welcome() {
	global $pagenow;
	if ( is_admin() && isset($_GET['activated'] ) && $pagenow == "themes.php" ) {
		$settings = sprintf( __( '<strong>Congratulations!</strong> You have successfully activated the <em>Autobahn</em> Child theme for Genesis. You should get started by configuring your settings via the regular <a href="%s" title="Genesis Framework Settings">Genesis Framework Settings page</a>. — Thank you for using this theme! I wish you a good -online- journey! <em>—David Decker, Autobahn theme developer :)</em>', 'autobahn' ) , admin_url( 'admin.php?page=genesis' ) );
		$output = printf( '<div class="updated"><p>%1$s</p></div>', $settings );
	}
}