<article> hook

[simbasounds]

I'm using this technique to create justified blocks: http://www.barrelny.com/blog/text-align-justify-and-rwd/

In order to apply it to the plugin's output I need to insert a space after , but I don't think there's a hook for that.

[wpsmith]

No, that's not needed. You can hook into the post_class filter and use the $gs_counter to determine which number you are on and add your own class for breakage. So assuming you want to break on the 4th one, it would be something like this:

add_filter( 'post_class', 'prefix_post_class' );
function prefix_post_class( $classes ) {
    global $gs_counter;
    $classes[] = ( $gs_counter + 1 ) % 4 ? 'break';
    return $classes;
}