app/views/alert_mailer/_comments.text.erb
<% if comments.count == 1 %>
The following new comment has been made on a planning application within <%= meters_in_words(alert.radius_meters.to_f) %> of <%= alert.address %>:
<% else %>
The following new comments have been made on planning applications within <%= meters_in_words(alert.radius_meters.to_f) %> of <%= alert.address %>:
<% end %>
<%= render partial: "comment", collection: comments, spacer_template: "spacer" -%>