Remove term underline on Firefox.

RubenVerborgh · RubenVerborgh · commit 00a5deb413ea · 2016-10-18T12:22:21.000+09:00
diff --git a/assets/style.css b/assets/style.css
@@ -193,6 +193,7 @@ ul.triples a:nth-child(2) {
 }
 abbr {
   border: none;
+  text-decoration: none;
 }
 
 .index {
