Improve instructions to authors upon replying to Report

comments/templates/comments/reply_to_report.html

@@ -28,6 +28,10 @@
         <div class="row">
             <div class="col-12">
                 <h2 class="highlight">Your Reply to this Report:</h2>
+		{% if is_author %}
+		<p><em>Please focus on responding to the Report. Although you are welcome to mention what you intend to change in your manuscript as a result of this Report, a formal list of changes is best kept as accompaniment to your eventual resubmission.</em></p>
+		<p><em>Attachments are here meant for e.g. informative graphs; please do not attach a new version of your manuscript to this Reply.</em></p>
+		{% endif %}
                 {% url 'comments:reply_to_report' report_id=report.id as add_comment_url %}
                 {% include 'comments/_add_comment_form.html' with url=add_comment_url form=form %}
             {% endif %}