app/views/tagging/_issue_tagcloud.erb
<a id="cloud_trigger"><b><%= t(:tags_in_project) %></b></a>
<span id="cloud_content"> —
<%
tag_cloud_in_project(@project) do |tag, factor|
style = "font-size: #{10 * factor + 9}pt"
%>
<a class="tag_item"
data-tag="<%= tag_without_sharp(tag) %>"
style="<%= style %>">
<%= tag %>
</a>
<% end %>
</span>