app/views/supervisor_mailer/_recently_unassigned_volunteers.html.erb
<% if supervisor.recently_unassigned_volunteers.any? %>
<tr style="font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; margin: 0; text-align: left;">
<td class="content-block" style="font-family: Helvetica,Arial,sans-serif; box-sizing: border-box; font-size: 14px; vertical-align: top; margin: 0; padding: 0 0 20px;" valign="top">
<b><%= "The following volunteers have been unassigned from you:" %></b>
<br>
<% supervisor.recently_unassigned_volunteers.each do |volunteer| %>
- <%= volunteer.display_name %>
<% unless volunteer.has_supervisor? %>
(not assigned to a new supervisor)
<% end %>
<br>
<% end %>
</td>
</tr>
<% end %>