Change 'Read More' to 'Çontinue Reading'

Although I managed to rename post excerpt ‘Read More’ link to ‘Çontinue Reading’ with the code below in functions.php for child theme, I’m getting a white screen on post update/preview. Is there an error in the coding?

<?php
// Change 'Read More'link from excerpt
function change_io_excerpt_more()
{
  function new_io_excerpt_more($more)
	{
		  return '<span class="continue-reading"> <a href="' . get_permalink() . '">Continue Reading &raquo;</a></span>';
	}
  add_filter('excerpt_more', 'new_io_excerpt_more');
}
add_action('after_setup_theme', 'change_io_excerpt_more');