app/views/hyrax/collections/_collection_description.erb
<%# [hyc-override] https://github.com/samvera/hyrax/blob/hyrax-v4.0.0/app/views/hyrax/collections/_collection_description.html.erb %>
<%# [hyc-override] truncate the description field by default %>
<% presenter.description.each do |description| %>
<% if description.split.size > 100 %>
<div class="truncated">
<%= simple_format(auto_link(description.truncate_words(100))) %>
</div>
<div class="full d-none">
<%= simple_format(auto_link(description)) %>
</div>
<button id="collection-description-text-btn" class="btn btn-default">Show More</button>
<% else %>
<%= simple_format(auto_link(description)) %>
<% end %>
<% end %>