Change “Continue reading →” of Twenty Eleven WordPress Theme from its Child Theme functions.php

I found it’s hard to change “Continue reading →” text after an Excerpt in WordPress  default Twenty Eleven theme from my child theme. It should be done from child theme’s functions.php

Here’s the code:

/***************************************
 * Change CONTINUE READING to READ MORE
 **************************************/

/********* CUSTOM EXCERPTS ************/

/* Removes the get_the_exerpt filter */
function iggy_remove_excerpt_filter() {
   remove_filter( 'get_the_excerpt', 'twentyeleven_custom_excerpt_more' );
}
add_action( 'after_setup_theme', 'iggy_remove_excerpt_filter' );

/* Adds a pretty "READ MORE" link to custom post excerpts  */

function iggy_custom_excerpt_more( $output ) {
	if ( has_excerpt() && ! is_attachment() ) {
		$output .= iggy_continue_reading_link();
	}
	return $output;
}
add_filter( 'get_the_excerpt', 'iggy_custom_excerpt_more' );

/*********** AUTO EXCERPTS **********/

/* Removes the excerpt_more filter */

function iggy_remove_auto_excerpt_filter() {
   remove_filter( 'excerpt_more', 'twentyeleven_auto_excerpt_more' );
}
add_action( 'after_setup_theme', 'iggy_remove_auto_excerpt_filter' );

/* Adds a pretty "READ MORE" link to custom post excerpts. */

function iggy_auto_excerpt_more( $more ) {
	return '… ' . iggy_continue_reading_link();
}
add_filter( 'excerpt_more', 'iggy_auto_excerpt_more' );

/* Returns a "READ MORE" link */
function iggy_continue_reading_link() {
	return ' <a href="'. esc_url( get_permalink() ) . '">' . __( 'Read More <span class="meta-nav">→</span>', 'twentyeleven' ) . '</a>';
}