--- a/mercurial/templates/static/style-paper.css	Sun Nov 19 13:18:54 2017 +0800
+++ b/mercurial/templates/static/style-paper.css	Sun Nov 19 14:02:50 2017 +0800
@@ -155,6 +155,15 @@
   vertical-align: baseline;
 }
 
+.instability {
+  color: #000;
+  font-size: 70%;
+  border-bottom: 1px solid #000;
+  font-weight: normal;
+  margin-left: .5em;
+  vertical-align: baseline;
+}
+
 .tag {
   color: #999;
   font-size: 70%;