Fix header styles for anchors generated by TableOfContentsFilter

app/assets/stylesheets/generic/typography.scss

@@ -35,7 +35,12 @@ pre {
   /* Link to current header. */
   h1, h2, h3, h4, h5, h6 {
     position: relative;
-    &:hover > :last-child {
+
+    a.anchor {
+      display: none;
+    }
+
+    &:hover > a.anchor {
       $size: 16px;
       position: absolute;
       right: 100%;