post_updated_messages

$messages['post'] = array(
    0  => '', // Unused. Messages start at index 1.
    1  => __( 'Post updated.' ) . $view_post_link_html,
    2  => __( 'Custom field updated.' ),
    3  => __( 'Custom field deleted.' ),
    4  => __( 'Post updated.' ),
    /* translators: %s: date and time of the revision */
    5  => isset( $_GET['revision'] ) ? sprintf( __( 'Post restored to revision from %s.' ), gc_post_revision_title( (int) $_GET['revision'], false ) ) : false,
    6  => __( 'Post published.' ) . $view_post_link_html,
    7  => __( 'Post saved.' ),
    8  => __( 'Post submitted.' ) . $preview_post_link_html,
    9  => sprintf( __( 'Post scheduled for: %s.' ), '<strong>' . $scheduled_date . '</strong>' ) . $scheduled_post_link_html,
    10 => __( 'Post draft updated.' ) . $preview_post_link_html,
);
$messages['page'] = array(
    0  => '', // Unused. Messages start at index 1.
    1  => __( 'Page updated.' ) . $view_page_link_html,
    2  => __( 'Custom field updated.' ),
    3  => __( 'Custom field deleted.' ),
    4  => __( 'Page updated.' ),
    /* translators: %s: date and time of the revision */
    5  => isset( $_GET['revision'] ) ? sprintf( __( 'Page restored to revision from %s.' ), gc_post_revision_title( (int) $_GET['revision'], false ) ) : false,
    6  => __( 'Page published.' ) . $view_page_link_html,
    7  => __( 'Page saved.' ),
    8  => __( 'Page submitted.' ) . $preview_page_link_html,
    9  => sprintf( __( 'Page scheduled for: %s.' ), '<strong>' . $scheduled_date . '</strong>' ) . $scheduled_page_link_html,
    10 => __( 'Page draft updated.' ) . $preview_page_link_html,
);
$messages['attachment'] = array_fill( 1, 10, __( 'Media file updated.' ) ); // Hack, for now.