app/assets/stylesheets/semantic-ui/collections/menu.less in semantic-ui-rails-0.16.1 vs app/assets/stylesheets/semantic-ui/collections/menu.less in semantic-ui-rails-0.18.0

@@ -186,9 +186,10 @@
     rgba(0, 0, 0, 0.05) 0%,
     rgba(0, 0, 0, 0.1) 50%,
     rgba(0, 0, 0, 0.05) 100%)
   ;
 }
+/*rtl:ignore*/
 .ui.menu > .menu:not(.right):first-child > .item:first-child:before,
 .ui.menu .item:first-child:before {
   display: none;
 }
 .ui.menu .menu.right .item:before,