discourse/app/views/user_notifications/digest.text.erb

<%- site_link = raw(@markdown_linker.create(@site_name, '/')) %>
<%= raw(t 'user_notifications.digest.why',
      site_link: site_link,
      last_seen_at: @last_seen_at) %>

<%- if @notifications.present? %>
### <%=t 'user_notifications.digest.new_activity' %>

<%- @notifications.each do |n| %>
* <%= raw(n.text_description { raw(@markdown_linker.create(n.data_hash[:topic_title], n.url)) }) %>
<%- end %>

<%- end %>
<%- if @new_topics.present? %>
### <%=t 'user_notifications.digest.new_topics' %>

<%- @new_topics.each do |t| %>
* <%= raw(@markdown_linker.create(t.title, t.relative_url)) %>
<%- end %>
<%- end %>

<%= raw(@markdown_linker.references) %>

<%=raw(t :'user_notifications.digest.unsubscribe',
     site_link: site_link,
     unsubscribe_link: raw(@markdown_linker.create(t('user_notifications.digest.click_here'), email_unsubscribe_path(key: @user.temporary_key))))  %>

<%= raw(@markdown_linker.references) %>