message: Remove `<span class="title">` around `Source` link on dropdown
  This fixes a bug where it would disappear if the screen width got too
  narrow.
diff: @@ -76,8 +76,7 @@ extra whitespace unremovable, need to use html tags unaffacted by whitespace T_T
  {# A link to the release's source view #}
  <li class="pure-menu-item">
  <a href="{{ crate_url | safe }}/source/" title="Browse source of {{ metadata.name }}-{{ metadata.version }}" class="pure-menu-link">
  - {{ "folder-open" | fas(fw=true) }}
  - <span class="title">Source</span>
  + {{ "folder-open" | fas(fw=true) }} Source
  </a>
  </li>
  </ul>
  