font sizing

lms/static/sass/_discussion.scss

 $comment_margin_left: 30px;
 $discussion_title_size: 1.6em;
 $comment_title_size: 1.2em;
-$comment_body_size: 1.0em;
+$comment_body_size: 0.9em;
 $comment_info_size: 0.75em;
 $discussion_input_width: 90%;
 
@@ -18,8 +18,8 @@ $discussion_input_width: 90%;
 
 .course-content {
   .discussion {
-    margin-left: flex-gutter(4);
-    margin-top: flex-gutter(6);
+    margin-left: flex-gutter();
+    margin-top: flex-gutter();
   }
 }
 

lms/templates/discussion/thread.html

@@ -88,7 +88,7 @@
     user No.${content['user_id']}
   % endif
   % if content.get('comments_count', -1) >= 0:
-    / ${content['comments_count']} comment(s)
+    , ${content['comments_count']} comment(s)
   % endif
 </%def>