mastodon/app/views/notification_mailer/digest.text.erb

<%= display_name(@me) %>,

<%= raw t('notification_mailer.digest.body', since: l(@since), instance: root_url) %>
<% @notifications.each do |notification| %>

* <%= raw t('notification_mailer.digest.mention', name: notification.from_account.acct) %>

  <%= raw Formatter.instance.plaintext(notification.target_status) %>

  <%= raw t('application_mailer.view')%> <%= web_url("statuses/#{notification.target_status.id}") %>
<% end %>
<% if @follows_since > 0 %>

<%= raw t('notification_mailer.digest.new_followers_summary', count: @follows_since) %>
<% end %>