Edit in JSFiddle

$(function() {
    $('ul.list li').smartTruncation();

    $('ul.file-list li').smartTruncation({
        'protectExtensions': true
    });

    $('ul.centered-list li').smartTruncation({
        'truncateCenter': true
    });
});

Default
<ul class="list">
  <li>
    Lorem ipsum dolor sit amet aliquip äx ea commodo consequat
    adipisicing elit, sed do aliquip
  </li>
  <li>
    Consectetur adipisicing elit, sed do aliquip ex ea commodo
    consequat
  </li>
  <li>
    Eiusmod tempor incididunt aliquip ex ea commodo consequat
  </li>
</ul>
Protect extension
<ul class="file-list">
  <li>
    Ruby Programming_Syntax_Classes - Wikibooks, collection
    of open-content textbooks.pdf
  </li>
  <li>
    Some_very_long_filename_for_a_keynote_presentation_
    still_going_on_and_on_and.key
  </li>
  <li>
    newsletter-subscription-optin-module.1.1.6.zip
  </li>
</ul>
Truncate centered
<ul class="centered-list">
  <li>
    Lorem ipsum dolor sit amet aliquip äx ea commodo consequat Lorem ipsum dolor sit amet aliquip äx ea commodo consequat
  </li>
  <li>
    Consectetur adipisicing elit, sed do aliquip ex ea commodo
    consequat
  </li>
  <li>
    Eiusmod tempor incididunt aliquip ex ea commodo consequat  Consectetur adipisicing elit, sed do aliquip ex ea commodo
    consequat
  </li>
</ul>

 ul.list, ul.file-list, ul.centered-list {
      border-top: 1px solid #fff;
      background: #eee;
      list-style: none;
      margin: 0;
      padding: 2em 50px;
    }

    ul.list li,
    ul.file-list li,
    ul.centered-list li {
      padding: .5em 0;
      border-bottom: 1px solid #fff;
    }