Tweaked help text for the nomcom member entry form.

- Legacy-Id: 11731

ietf/templates/nomcom/edit_members.html

@@ -10,9 +10,22 @@
   {% origin %}
   <h2>
      Edit members
-     <small>Fill in this form with the email addresses of nomcom members to register them with the datatracker as nomcom members</small>
   </h2>
 
+  <div class="help-block">
+
+     Fill in this form with the email addresses of nomcom members to register
+     them with the datatracker as nomcom members.
+
+  </div>
+  <div class="help-block">
+
+     The email addresses should be the primary email addresses of the members'
+     datatracker accounts, and they should be entered as a comma-separated
+     list, with optional white-space.
+
+  </div>
+
   <form method="post">
     {% csrf_token %}
     {% bootstrap_form form %}