Style warning about mentioning many people in a comment

CHANGELOG

@@ -6,6 +6,7 @@ v 8.3.0 (unreleased)
   - Trim leading and trailing whitespace of milestone and issueable titles (Jose Corcuera)
   - Add ignore whitespace change option to commit view
   - Fire update hook from GitLab
+  - Style warning about mentioning many people in a comment
 
 v 8.2.2
   - Fix 404 in redirection after removing a project (Stan Hu)

app/views/projects/_md_preview.html.haml

@@ -8,17 +8,17 @@
         %a.js-md-preview-button(href="#md-preview-holder" tabindex="-1")
           Preview
 
-    - if defined?(referenced_users) && referenced_users
-      %span.referenced-users.pull-left.hide
-        = icon('exclamation-triangle')
-        You are about to add
-        %strong
-          %span.js-referenced-users-count 0
-          people
-        to the discussion. Proceed with caution.
-
   %div
     .md-write-holder
       = yield
     .md.md-preview-holder.hide
       .js-md-preview{class: (preview_class if defined?(preview_class))}
+
+  - if defined?(referenced_users) && referenced_users
+    %span.referenced-users.pull-left.hide
+      = icon('exclamation-triangle')
+      You are about to add
+      %strong
+        %span.js-referenced-users-count 0
+        people
+      to the discussion. Proceed with caution.