White Space on translated strings lost

The actual code is

        <?php
            /* translators: used between list items, there is a space after the comma */
            $tags_list = get_the_tag_list( '', __( ', ', 'timo' ) );
            if ( $tags_list ) :
        ?>
        <span class="tags-links">
            <?php printf( __( 'Tagged %1$s', 'timo' ), $tags_list ); ?>
        </span>
        <?php endif; // End if $tags_list ?>

I’ve now also found this post here – but i think my translation is done bad.