Centered text lines in markuplist

[Andrew Bernard]

How does one centre a block of justified text spanning multiple pages?
[Text here obviously abbreviated for the purposes of the MWE.]

Andrew


=== snip

\markuplist {
  \override #'(line-width . 60)
  \justified-lines {
    Lorem ipsum dolor sit amet, consectetur adipiscing elit. Phasellus
    scelerisque justo ut posuere aliquam. Integer aliquet eu nunc a
    iaculis. In hac habitasse platea dictumst. Maecenas ornare leo non est
    hendrerit, ac ultricies justo porttitor. Nullam pulvinar mollis
    scelerisque. Pellentesque ut quam quis nibh laoreet consequat. Etiam vitae
    felis eu leo sodales vulputate.
  }
}


== snip