Editing post comment link

I’m editing the Vortex theme, and through search I found how to move the comments link from under the post title to the post footer. My problem is that there is a comma before the link. I searched the php code but I’m not sure which comma to delete

function vortex_post_comments() {

	if ( ( ! comments_open() || post_password_required() ) ) {
		return;
	}

	ob_start();
	comments_number( __( 'Leave a Comment', 'vortex' ), __( '1 Comment', 'vortex' ), __( '% Comments', 'vortex' ) );
	$comments = ob_get_clean();

	/** Output */
	$comments = sprintf( '<a href="%s">%s</a>', esc_url( get_comments_link() ), $comments );
	$output = sprintf( '%2$s<span class="comments-link">%1$s</span>', $comments, vortex_entry_meta_sep() );
	return $output;
}

Here’s the site in case you need to see. And some help on how to install the edited function would be reall welcome because I don’t remember php that well..!