Fix issue metacpan#186 (html is visually missing underscores).

Author: plu

root/static/css/shCore.css

@@ -34,7 +34,7 @@
   float: none !important;
   height: auto !important;
   left: auto !important;
-  line-height: 1.1em !important;
+  line-height: 1.2em !important;
   margin: 0 !important;
   outline: 0 !important;
   overflow: visible !important;