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

<% if status.spoiler_text? %>
> <%= raw word_wrap(status.spoiler_text, break_sequence: "\n> ") %>
> ----
>
<% end %>
> <%= raw word_wrap(extract_status_plain_text(status), break_sequence: "\n> ") %>

<%= raw t('application_mailer.view')%> <%= web_url("@#{status.account.pretty_acct}/#{status.id}") %>