#Подключение файла .css во вью
../app/assets/stylesheets/tpl_admin.css.scss
.big {
font-size: 80%;
line-height: 12px;
}
../app/views/cluster/index.html.haml
= stylesheet_link_tag "tpl_admin", media: "all"
some code
.big
= (nl2br item.admin_notes || "").html_safe