anchor.diff:      </script>
     </div>
   
  +<% if @check.respond_to?(:invert) %>
     <div class="form-group">
       <%= f.label "Failure criterion?" %>
       <%= f.select :invert, [['Fail if ANY results returned (default)', false], ['Fail if NO results returned (invert)', true]], {}, {id: 'select-invert'} %>
  
positive.code:       });
      </script>
    </div>
  
    <div class="form-group">
      <%= f.label :emails %>
  
negative.code: <p class="text-muted">Checks are designed to identify bad data. A check fails if there are any results.</p>
  <% if @check.respond_to?(:invert) %>
    <p class="text-muted">An inverted check is designed to notice missing data. It fails if there are NO results. Select "Fail if NO results are returned" below to invert the check.</p>
  <% end %>
  
  <% if @check.errors.any? %>
    <div class="alert alert-danger"><%= @check.errors.full_messages.first %></div>
  