Thanks! you are right.
<?php previous_post_link( ‘%link’, ‘<span class=”meta-nav”>’ . _x( ‘←’, ‘Previous post link’, ‘twentyten’ ) . ‘</span> %title’ ); ?>
But it looks quite messy, so what is the code we really need?
Also I noticed in the new theme, the ‘twentyten’ appears in so many places. What is it for? Does it really need to be there?
Can anybody explain what is “. _x” for as well please?