thoughtout on "[Theme: Spun] Change Sentence in Footer"

Hi, I have done exactly this;
activated childtheme
pasted the entire footer file in the child theme CSS
replaced the code as shown

but nothing happens. I'd be grateful to know what i'm missing

<?php
/**
 * The template for displaying the footer.
 *
 * Contains the closing of the id=main div and all content after
 *
 * @package Spun
 */

$spun_facebook = get_theme_mod( 'jetpack-facebook' );
$spun_twitter = get_theme_mod( 'jetpack-twitter' );
$spun_tumblr = get_theme_mod( 'jetpack-tumblr' );
$spun_linkedin = get_theme_mod( 'jetpack-linkedin' );
?>

	</div><!-- #main .site-main -->

	<footer id="colophon" class="site-footer" role="contentinfo">
		<div class="site-info">
			<?php do_action( 'spun_credits' ); ?>
			<a href="http://www.thoughtoutthings.co.uk/">COPYRIGHT &copy; 2014 Gillian Morrison</a>
<span class="sep"> | </span>
        	ALL RIGHTS RESERVED
		</div><!-- .site-info -->
		<?php if ( $spun_facebook || $spun_twitter || $spun_tumblr || $spun_linkedin ) : ?>
			<div class="social-links">
			<?php if ( $spun_facebook ) : ?>
				<a href="<?php echo esc_url( $spun_facebook ); ?>" class="facebook-link" data-icon="">
					<span class="screen-reader-text"><?php esc_html_e( 'Facebook', 'spun' ); ?></span>
				</a>
			<?php endif; ?>
			<?php if ( $spun_linkedin ) : ?>
				<a href="<?php echo esc_url( $spun_linkedin ); ?>" class="linkedin-link" data-icon="">
					<span class="screen-reader-text"><?php esc_html_e( 'LinkedIn', 'spun' ); ?></span>
				</a>
			<?php endif; ?>
			<?php if ( $spun_twitter ) : ?>
				<a href="<?php echo esc_url( $spun_twitter ); ?>" class="twitter-link" data-icon="">
					<span class="screen-reader-text"><?php esc_html_e( 'Twitter', 'spun' ); ?></span>
				</a>
			<?php endif; ?>
			<?php if ( $spun_tumblr ) : ?>
				<a href="<?php echo esc_url( $spun_tumblr ); ?>" class="tumblr-link" data-icon="">
					<span class="screen-reader-text"><?php esc_html_e( 'Tumblr', 'spun' ); ?></span>
				</a>
			<?php endif; ?>
			</div>
		<?php endif; ?>
	</footer><!-- #colophon .site-footer -->
</div><!-- #page .hfeed .site -->

<?php wp_footer(); ?>

</body>
</html>