<% define_content :link do %>
  <%= polymorphic_url([asset.context, :file], id: asset) %>
<% end %>
<%= t 'New file added for %{name}', :name => asset.context.name %>
<%= asset.title %> (<%= asset.readable_size %>)

<%= t('link', 'More info at %{link}', :link => content(:link)) %>
